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NRHA Medications Database

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Please Note: While we make every effort to ensure the NRHA Medications Database is current and accurate, in the event of any discrepancies or questions, the official source of record is the 2025 NRHA Animal Welfare & Medications Policy, as approved by the NRHA Board of Directors.

ALL # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Permitted Conditionally Permitted Banned
  • 1-androsterone
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A metabolite of testosterone and dihydrotestosterone with no legitimate therapeutic indication in the equine athlete
  • 1,3-Dimethylamylamine
    Iron Tiger, Forthane, Geranamine, DMAA, Floradrene
    Banned
    Click to expand
    Definition: Sympathomimetic
    Information:
    1,3-Dimethylamylamine is a stimulant that can affect performance and has no legitimate use in sports horses
  • 3β-Hydroxy-5α-androstan-17-one
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A metabolite of testosterone and dihydrotestosterone with no legitimate therapeutic indication in the equine athlete.
  • 4-chloromethandienone
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A synthetic anabolic steroid which has no legitimate therapeutic indication in the equine athlete
  • 5α-Androst-2-ene-17-one
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A derivative of dihydrostetosterone (DHT) and metabolite of dehydroepiandrosterone (DHEA). It has no legitimate therapeutic indication in the equine athlete.
  • 5α-Androstane-3α,17α-diol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A metabolite of testosterone and dihydrotestosterone with no legitimate therapeutic indication in the equine athlete.
  • 5α-Androstane-3α,17β-diol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A metabolite of dihydrotestosterone (DHT) with no legitimate therapeutic indication in the equine athlete.
  • 5α-Androstane-3β,17α-diol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A metabolite of dihydrotestosterone (DHT) and dehydroepiandrosterone (DHEA) with no legitimate therapeutic indication in the equine athlete.
  • 5α-Androstane-3β,17β-diol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A metabolite of dihydrotestosterone (DHT) and dehydroepiandrosterone (DHEA) with no legitimate therapeutic indication in the equine athlete.
  • 5β-Androstane-3α,17β-diol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A metabolite of dihydrotestosterone (DHT) and dehydroepiandrosterone (DHEA) with no legitimate therapeutic indication in the equine athlete.
  • 7-Keto-DHEA
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A prohormone of dehydroepiandrosterone (DHEA) with no legitimate therapeutic indication in the equine athlete.
  • 7α-Hydroxy-DHEA
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A metabolite of dehydroepiandrosterone (DHEA) with no legitimate therapeutic indication in the equine athlete.
  • 7β-Hydroxy-DHEA
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A metabolite of dehydroepiandrosterone (DHEA) with no legitimate therapeutic indication in the equine athlete.
  • 17 alpha hydroxyprogesterone (in mares)
    Hydroxyprogesterone Caproate, Hydroxyprogesterone Hexanoate
    Conditionally Permitted
    Click to expand
    Definition: Hormone
    Information:
    17 alpha hydroxyprogesterone is a progestogen used suppress oestrus and maintain pregnancy in mares. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • 17 alpha hydroxyprogesterone (in stallions & geldings)
    Hydroxyprogesterone Caproate, Hydroxyprogesterone Hexanoate
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    LISTED ACCORDING TO LIST PRINCIPLES 17 alpha hydroxy progesterone has been formulated as synthetic ester derivatives of the natural endogenous steroid, 17 alpha progesterone. Commercially as a slow release ester in an oily depot suspension for intramuscular use, it has long and very variable excretion times in horses. There are also some oral paste formulations. It has been widely used in human medicine for menstrual disorders and hormonal deficiencies in pregnancy. Similar to other synthetic progestogens, HPH is used for estrus suppression and pregnancy maintenance in mares. It is also indicated for progesterone deficiency in mares and associated behavioural problems. In stallions and geldings it has an anabolic effect.
  • 17-hydroxyprogesterone hexanoate (in mares)
    Conditionally Permitted
    Click to expand
    Definition: Hormone
    Information:
    17-hydroxyprogesterone hexanoate may be used to synchronise oestrus in mares. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • 17-hydroxyprogesterone hexanoate (in stallions & geldings)
    Banned
    Click to expand
    Definition: Hormone
    Information:
    17-hydroxyprogesterone hexanoate may be used to synchronise oestrus in mares.
  • 19-Norandrosterone
    Banned
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    Definition: Anabolic
    Information:
    A metabolite of nandrolone and bolandione with no legitimate therapeutic indication in the equine athlete.
  • 19-Noretiocholanolone
    Banned
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    Definition: Anabolic
    Information:
    A metabolite of nandrolone and bolandione with no legitimate therapeutic indication in the equine athlete.
  • 20-Hydroxyecdysone
    Banned
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    Definition: Anabolic
    Information:
    A substance that enhances physical performance and has anti-arrhythmia effects. It is also used in the treatment of rheumatoid arthritis. The substance has no legitimate therapeutic indication in the equine athlete.
  • Acebutolol2
    Sectral, Monitan, Rhotral, Pindalol, Neptall, Prent
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    Often combined with diuretic, Acebutolol is available as prescription-only medicine (POM) in UK & USA for human use, not in animals. High potential for influencing performance; prohibited by equine control bodies.
  • Acefylline
    Etaphylline, Etophylate
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    Acefylline may relieve bronchospasms and the effects of pulmonary oedema, often combined for instance with Benadryl for motion sickness in humans. Not licensed for horses; high potential to influence performance.
  • Acemetacin
    Emflex
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is licensed as prescription-only in the UK (POM) for human use; widely available without prescription in other countries. High potential to influence performance.
  • Acenocoumarol
    Sintrom, Sinthrome
    Banned
    Click to expand
    Definition: Anticoagulant
    Information:
    Carefully controlled use, with close monitoring of blood clotting times, is required where Acenocoumarol is used in prescription only (UK POM, FDA control in USA) human medicine & for companion animals by licensed practitioners. High potential for influencing performance; prohibited by equine control bodies.
  • Acepromazine
    ACP, Sedalin Gel, Atrovet, PromAce, Notensil, Acetylpromazine
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Acepromazine may be used to reduce anxiety and sedate horses. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Acetaminophen (Paracetamol)
    Anacin3, Mersyndol, Panadol, Pardale-V, Syndol, Tempra, Tylenol
    Conditionally Permitted
    Click to expand
    Definition: Analgesic
    Information:
    Acetaminophen (Paracetamol) may be used to relieve pain and control fever. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Acetanilid
    Antifebrin, Ethananalide, N-acetylanaline,2-Acetanalide
    Banned
    Click to expand
    Definition: Analgesic/antipyretic
    Information:
    Acetanilid is rapidly excreted as salicyluric acid; urine may test positive for sugar. Acetanilid, as Antifebrin, is little used now due to gastric irritation and toxicity causing methaemoglobinaemia with severe liver and kidney damage. High potential for influencing performance.
  • Acetazolamide
    Acemit, Azomid, Diamox, Glaupax, Novo-Zolamide, Storzolamide
    Conditionally Permitted
    Click to expand
    Definition: Diuretic
    Information:
    Acetazolamide may be used in the control of seizures, glaucoma and oedema. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Acetohexamide
    Dymelor
    Banned
    Click to expand
    Definition: Pancreatic stimulant
    Information:
    Acetohexamide is prescription-only human medicine; it is unsuitable for insulin-dependent diabetes mellitus (IDDM), as it requires functioning pancreas for endogenous insulin production. Use has been associated with increased risk of cardiovascular mortality.
  • Acetophenazine
    Tindal, Fluphenazine
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Acetophenazine has prescription-only use in human medicine as a tranquilliser for appropriate psychoses; an anthelminthic phenothiazine/piperazine mixture is licensed for horses (not pregnant mares), and used as a tranquilliser. Moderate potential for influencing performance.
  • Acetophenetidin (Phenacetin)
    Codempiral, Commotional, Contradouleur, Emprazil, P-A-C Compound, Paramette, Phenaphen Plus, Stellacyl, Thephorin A-C
    Banned
    Click to expand
    Definition: Analgesic
    Information:
    It has analgesic and antipyretic properties.
  • Acetylmorphine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Narcotic
    Information:
    No current medical application exists. There has been experimental epidural use of the analogue hydromorphone in horses for analgesia of perineal, sacral, lumbar & thoracic pain (Louisiana State University School of Veterinary Medicine). High potential for influencing performance.
  • Adinazolam
    Deracyne, Adinazolam is available by generic name
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    Adinazolam is prescription-only human medicine used for anxiety and status epilepticus; it rapidly metabolises to active products (including estazolam). Estazolam, marketed in UK, USA and Asia for insomnia treatment, has additional skeletal muscle relaxant action. High potential for influencing performance.
  • Adiphenine
    Spasnil oral, Fulton anti-douleur capsule
    Banned
    Click to expand
    Definition: Antispasmodic
    Information:
    Adiphenine may be combined with other medicines in prescription-only products for symptomatic relief of spasms associated with IBD, dysmenorrhoea, cystitis. High potential for influencing performance in affected individuals.
  • Adrafinil
    Olmifon, Provigil, Vigil, Modasomil, Modiadal, Modalert, Provake, Resotyl, Alertex
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Adrafinil is available from outside USA (including Europe) in unregulated products, used off-label (often by night shift workers) to avoid fatigue, and for Attention Deficit Hyperactive Disorder (ADHD); prohibited in human sports. Modafinil is licensed in Europe, Asia, North and South America to relieve effects of MS, depression fatigue, myotonic dystrophy, cerebral palsy. High potential to influence performance.
  • Adrenaline
    Adrenalin, Epinephrine, Anapen, Epipen, Twinject
    Conditionally Permitted
    Click to expand
    Definition: Hormone
    Information:
    Adrenaline may be used in the treatment of anaphylaxis, cardiac arrest and asthma. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Adrenochrome
    Kentucky Red, Adrenosem salicylate, Adrestat-F, Dot-Chrome-DS, Stadren, Adona, Golcort
    Banned
    Click to expand
    Definition: Haemostatic
    Information:
    As a pigmented chemical, Adrenochrome is essentially uncontrolled in USA, though must conform to regulations for nutritional supplements where sold as such, or be regulated by the FDA as drug or foodstuff. In horses it reduces exercise induced pulmonary haemorrhage and has been prohibited by some competitive bodies due to potential for influencing performance in affected horses.
  • Adrenocorticotrophic hormone (ACTH)
    ACTH
    Conditionally Permitted
    Click to expand
    Definition: Hormone
    Information:
    ACTH (Adrenocorticotrophic hormone) simulates the production of endongenous steroids. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • AICAR
    AICAR
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    AICAR is a peptide that can have anabolic effects in the horse by converting fast-twitch muscle fibres to more energy-efficient slow-twitch types of fibres. It also increases blood flow to enhance the horse's performance.
  • Albuterol (Salbutamol)
    Ventolin, Proventil, Torpex, Volmax, Ventipulmin
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Albuterol (salbutamol) may be used in the treatment of respiratory disease. The detection time is estimated with 96 hours (4 days) after inhalational administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Alclofenac
    Preservex, Prinalgin, Zumaril
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Alclofenac is licensed for human acute and chronic pain conditions; not for horses. Rapid-acting,it reaches high levels in joint tissue; half-life of metabolites in urine is around 35 hours. High potential to affect performance.
  • Alcuronium
    Alloferin, Acenkoumarol
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    Alcuronium is most often used to assist surgical anaesthesia; also assists management of respiratory problems in tetanus. High potential to affect performance.
  • Aldosterone
    Florinef, Aldocortin, Electrocortin
    Banned
    Click to expand
    Definition: Hormone
    Information:
    Aldosterone is used to treat electrolyte imbalances in endocrine disorders such as adrenal insufficiency (Addison's disease). Significant potential to affect performance; use in horses is prohibited by equine control bodies. Urinary excretion products include pregnanediol as for other hormones, so blood testing is preferred.
  • Alendronate
    Fosamax
    Banned
    Click to expand
    Definition: Bone metabolism agent
    Information:
    A bisphosphonate drug used for the treatment of osteoporosis and other bone diseases. It is considered a risk to equine welfare and has no legitimate therapeutic indication in the equine athlete.
  • Alfentanil
    Alfenta, Rapifen
    Banned
    Click to expand
    Definition: Narcotic
    Information:
    Alfentanil is classified as Controlled Drug (CD) Schedule II in UK and USA; licensed for use by registered veterinary practitioners for surgical analgesia in companion animals. Not licensed for equine use.
  • Allopurinol
    Zyloprim, Aloprim, Zyloric, Progout, Alluline, Allohexal
    Banned
    Click to expand
    Definition: Xanthine oxidase inhibitor (anti-hyperuricaemia)
    Information:
    Allopurinol is not licensed for animal use; off-licence use by veterinary practitioners in UK and USA, for example, helps reduce uric acid levels causing urolithiasis formation in companion animals and gout in birds and reptiles. It aids treatment of Leishmaniasis.
  • Almotriptan
    Almogran, Axert, Almogran, Sumatriptan
    Banned
    Click to expand
    Definition: 5-hydroxatryptamine agonist (antimigraine)
    Information:
    Almotriptan is used to abort migraine or cluster headaches (not preventative or cure) and for sound and light phobias. Not licensed for animal use; significant potential to influence performance in affected horses.
  • Alpha-Casozepine
    Zylkene
    Conditionally Permitted
    Click to expand
    Definition: Sedative
    Information:
    A peptide originating from cows milk which has calming effects on horses

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Alphadolone acetate
    Althesin, Saffan
    Banned
    Click to expand
    Definition: Neurosteriod
    Information:
    Alphadolone acetate mixed with Alphaxolone has been licensed for veterinary use in cats and monkeys in UK; not for use in horses. High potential to influence performance.
  • Alphaprodine
    Maxitram, Ultram, Ryzolt, Ralivia, Zytram, Zamadol, Ultracet, Tramacet
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    Alphaprodine controls moderate to severe pain for acute procedures and chronic conditions; it is rapidly absorbed, with high tissue affinity,plasma half-life 7 hours; urinary exctretion 30% unchanged. Not licensed for horses. High potential to affect performance.
  • Alpidem
    Ananxyl
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    Alpidem is prescription-only licensed for moderate to severe anxiety without sedation at normal dose rates; very high doses have anti-convulsant effects. Not approved for use in horses, and prohibited by equine control bodies. It was withdrawn from most countries after reports of severe liver damage from the product named Ananxyl.
  • Alprazolam
    Xanax, Niravam, Alprazolam
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    Alprazolam is prescription-only licensed for acute tranquiliser and amnesia effects in animals for the control of anxiety or fear-related conditions often associated with panic episodes such as car journeys, or noise-phobias. Not approved for equine use. Has high potential to influence performance.
  • Alprenolol
    Regletin, Aptine
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    Alprenolol reduces hypertension associated with increased heart rate and/or force of contraction, for example in thyrotoxicosis, arrhythmia. Potential for small animal use. Not approved for equine use.
  • Althesin
    Saffan, Alfaxan
    Banned
    Click to expand
    Definition: IV anaesthetic
    Information:
    Althesin is licensed for registered veterinary practitioner use in anaesthesia of cats and monkeys and unlicensed use in other small mammals. Not for use in horses; high potential to affect performance.
  • Althiazide
    Hydrochlorothiazide, Apresazide, Aldoril, Avalide, Capozide, Accuretic
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Althiazide is widely used for hypertension, congestive heart failure and oedema; often with potassium supplement or angiotensin-converting enzyme (ACE) inhibitor to cancel out potassium loss; chronic use produces peripheral vasodilatation. High potential to affect performance.
  • Altrenogest (permitted in mares; not permitted in stallions or geldings)
    Regumate
    Conditionally Permitted
    Click to expand
    Definition: Hormone
    Information:
    Not permitted in geldings or stallions. Altrenogest is a progestin used in the synchronisation and suppression of oestrus in mares. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Alverine
    Spasmonal, Profenil, Spasmine
    Banned
    Click to expand
    Definition: Antispasmodic
    Information:
    Alverine is available world-wide without prescription for relief of painful oestrus, colic, and other irritable or painful bowel conditions.
  • Amantadine
    Symmetrel, Lysovir, Endantadine
    Conditionally Permitted
    Click to expand
    Definition: Dopamine agonist
    Information:
    Amantadine may be used in the treatment of viruses and pain With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Ambenonium
    Mytelase, Myeuran, Ambegon
    Banned
    Click to expand
    Definition: Cholinesterase inhibition
    Information:
    Ambenonium chloride salts are prescription-only products used by medical and veterinary practitioners treating muscle weakness caused by diseases such as myasthenia gravis. High potential to affect performance.
  • Ambroxol
    Mucosalvan, Ambril, Ambrosan, Amxol
    Conditionally Permitted
    Click to expand
    Definition: Mucolytic
    Information:
    Ambroxol may be used in the treatment of respiratory disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Ambucetamide
    Neomeritine, Femerital, Dibutamide
    Banned
    Click to expand
    Definition: Antispasmodic
    Information:
    Ambucetamide, originally licensed for dysmenorrhoea, remains available for treating spasmodic menstrual and intestinal pain, though no longer marketed in USA. Not approved for animal use. High potential to affect performance in affected patients.
  • Amcinonide
    Cyclocort, Aminocide Cream
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Amcinonide reduces inflammation, swelling, itching and irritation associated with various skin disorders. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Amfepramone
    Tenuate, Tepanil, Atractil
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Amfepramone is licensed as anti-obesity medicine with off-label use for migraine relief; it behaves like dexamphetamine. Schedule II controlled in USA, it is rapidly absorbed from gut, and extensively metabolised to active products.
  • Amfetaminil
    Aponeuron, Aphetaminil
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Amfetaminil was used to treat obesity and narcolepsy but withdrawn due to abuse. Helpful in children with hyperactivity disorders such as Attention Deficit Hyperactivity Disorder (ADHD). Not officially available in most countries. High potential to affect performance.
  • Amidephrine
    Dricol
    Banned
    Click to expand
    Definition: Vasoconstrictor
    Information:
    Amidephrine mesylate is included in many non-prescription nasal decongestant preparations. Also used by licensed practitioners to improve circulation to organs and tissues, and may be given with atropine for reflex bradycardia. High potential to affect performance.
  • Amiloride
    Moduretic, Midamor, Safaretic tab, Amiloride, Amilamont oral solution, Moduretic, Actaris tab, Aminide tab
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Amiloride is given by medical and veterinary practitioners, often with thiazide therapy, to balance potassium loss in hypertension and congestive heart failure. In hepatic cirrhosis it helps prevent metabolic alkalosis. High potential to influence performance.
  • Amineptine
    Survector
    Banned
    Click to expand
    Definition: Tricyclic antidepressant
    Information:
    Amineptine helps relieve melancholic, unmotivated low-grade depression; does not affect cognition or anxious/agitated depression. Off-label investigative use includes Parkinsonism, Attention Deficit Hyperactive Disorder (ADHD), Amotivational syndrome. Significant potential to affect performance.
  • Aminocaproic Acid
    Amicar, Caprocid, Hamostat tab, Hamostat inj, Hemocid injection
    Conditionally Permitted
    Click to expand
    Definition: Anti-fibrinolytic
    Information:
    Aminocaproic acid may be used in the treatment of bleeding disorders. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Aminoglutehthamide
    Cytodren
    Banned
    Click to expand
    Definition: Aromatase inhibitor
    Information:
    Aminoglutehthamide is prescription-only licensed for medical and veterinary practitioner use in treatment of Cushing's syndrome (hyperadrenocorticism); and for human metastatic breast and prostate cancer therapy; abused by body-builders. Plasma half-life 13 hours; half a single dose excreted unchanged in urine over 48 hours. High potential to affect performance; prohibited in all sports.
  • Aminoheptane
    2-aminoheptane sulphate
    Banned
    Click to expand
    Definition: Vasopressor
    Information:
    Aminoheptane,as 2-aminoheptane sulphate; is used in human medicine as nasal decongestant and in sinusitis and rhinitis preparations. Not approved for animal use; significant potential to affect performance; prohibited by equine control bodies.
  • Aminomethylbenzoic acid
    Trasylol tissue glue, Gumbix, AmBenamp, Fluka
    Banned
    Click to expand
    Definition: Anti-fibrinolytic
    Information:
    Aminomethylbenzoic acid has been used to control bleeding in wounds during dental procedures,and in deep surgical sites such as ears or abdomen; the FDA-licensed injection was withdrawn May 2008 due to high risk of serious effects. Used in tissue glue.
  • Aminophylline
    Ami-nesine, Ami-lone, Etamyphylline derivative, Millophylline-V, Dalophylline gel
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Aminophylline may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Aminopicoline
    Picolamine 3MP
    Banned
    Click to expand
    Definition: Nitric oxide synthase inhibitor
    Information:
    Aminopicoline suppresses Nitric Oxide Synthase (NOS) activity, which includes response to inflammatory conditions, smooth muscle relaxation causing vasodilation (endothelial NOS), and peripheral and central nerve cell communication (neuronal NOS); reduced testicular NOS affects fertility and control of cytokines and hormones here. Not licensed for animal use; high potential to affect performance.
  • Aminopromazine
    Jenotone
    Banned
    Click to expand
    Definition: Antispasmodic
    Information:
    Aminopromazine fumarate is licensed for veterinary practitioner use in the relief of excessive muscle contraction, such as in urolithiasis in dogs and cats, colic in horses; other intestinal irritation. May also help uterine spasms.
  • Aminopterin
    Aminopterin sodium, Deoxyfolic acid sodium salt, Aantifolic acid, APGA
    Banned
    Click to expand
    Definition: Immunosuppressant
    Information:
    Introduced for child leukaemia treatment,but replaced in mid-1960s by methotrexate, the use of Aminopterin is finding favour again in chemotherapy. Good results reported (USA off-label use) in psoriasis. No therapeutic use in animals. Used in cell culture media.
  • Aminorex
    Menocil
    Conditionally Permitted
    Click to expand
    Definition: Parasympathomimetic
    Information:
    Aminorex is a situmlant and a metabolite of levamisole, a Controlled Medication. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Amiodarone
    Pacerone tablets, Nexterone injection, Cordarone-X injection, Amiodarone HCl tablets
    Conditionally Permitted
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    Amiodarone may be used in the treatment of heart rhythm abnormalities. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Amiphenazole
    Daptazile, Daftazole
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Amiphenazole was widely used as an antidote to barbiturate or opiate overdoses, other sedative poisoning, or respiratory failure (now often replaced by doxapram, specific antagonists). Large doses slowly eliminated,effective 2-3 days; high potential to affect performance.
  • Amisometradine
    Aminoisometradine, Rolicton
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Licensed for mild to moderate oedema states in congestive heart failure and liver cirrhosis, use of Amisometradine must be intermittent, or tolerance develops. Significant potential to affect performance.
  • Amisulpride
    Solian, Amisulpride
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Amisulpride is licensed as a neuroleptic for acute and chronic human schizophrenic disorders; also causes somnolence or sedation. No therapeutic indication in animals; high potential to affect performance.
  • Amitriptylline
    Amitriptyline, Endep, Elavil, Elanil, Triptafen, Triaval, Amitone tab, Tryptamol tab, Qualitriptine tab
    Banned
    Click to expand
    Definition: Tricyclic antidepressant
    Information:
    Prescription-only products are used in human medicine for all types of major depression, neuropathic and chronic pain, insomnia, restlessness, and in veterinary medicine for obsessive grooming behaviour, inappropriate urination and separation anxiety. High potential to affect performance.
  • Amlodipine
    Norvasc, Istin, Amlostin, Caduet, Lotral, Exforge
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    Amlodipine besylate is often combined in prescription-only products in human and veterinary medicine for systemic hypertension, for refractory cardiac failure (dogs); all forms of human angina. Not approved for use in horses.
  • Ammonium Chloride (injection)
    An inorganic compound with the formula NH4Cl.
    Banned
    Click to expand
    Definition: Acidifying agent
    Information:
    An inorganic compound with the formula NH4Cl, ammonium chloride is a white crystalline salt, highly soluble in water. Solutions of ammonium chloride are mildly acidic. Sal ammoniac is a name of the natural, mineralogical form of ammonium chloride.
  • Ammonium Sulphate
    Banned
    Click to expand
    Definition: Nerve-blocking agent
    Information:
    Used for surface anaethesia
  • Ammonium sulphide
    Banned
    Click to expand
    Definition: Nerve-blocking agent
    Information:
    Used for surface anaesthesia
  • Amobarbital
    Isomytal injection, Amytal Sodium, Amytal, Tuinal, Seconal Sodium Pulvules
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Amobarbital sodium is Federal Controlled in USA, used as a sedative, short-term insomnia or anxiety treatment,and pre-anaesthetic mediation. High lipid solubility means rapid tissue penetration; hepatic metabolism produces mostly changed urine excretion over 5-6 days. Testing of oral fluid has been proposed. High potential to affect performance.
  • Amodiaquine
    Camoquin, Basoquin, Camoquin, Flavoquin
    Banned
    Click to expand
    Definition: Antimalarial
    Information:
    Besides being licensed for malarial treatment and prophylaxis, Amodiaquine has been tried with varied success for amoebia and giardia infection, in rheumatoid arthritis and mild lupus erythematosis. Not approved for animal use; may affect performance.
  • Amopyroquine
    Propoquin
    Banned
    Click to expand
    Definition: Antimalarial
    Information:
    Amopyroquine (also called Propoquin or Amopyrochinum) has been used to treat chloroquine-resistant malaria and for rheumatoid arthritis treatment. It has not been approved for animal use but may potentially affect performance.
  • Amoxapine
    Amoxapine Tablets USP, Ascendin, Demolox, Mocadil
    Banned
    Click to expand
    Definition: Tricyclic antidepressant
    Information:
    Amoxapine is prescription-only, licensed for use in various types of human depressive, anxiety and panic disorders. Also used for psychogenic dermatoses in dogs and cats. Not approved for equine use.
  • Amperozide
    Hogpax
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Amperozide was not adopted for clinical use in human medicine. It is licensed for veterinary use in intensive pig farming to reduce aggression and stress levels, and improve feed uptake and productivity. Not approved for equine use.
  • Amphetamine
    Benzadrine, Adderall, Dexedrine, Speed
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Amphetamine is a Controlled Drug in many countries: Schedule II (USA), III (Canada), Class B (UK),S8 (Aust). It has few veterinary uses, but is used mainly as an analeptic causing hyperventilation. High potential to affect performance, used illegally for recreational purposes, and prohibited by all competition control bodies. Most excreted unchanged in urine.
  • Amphetaminil
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Amphetaminil (or Amfetaminil) was licensed for treating obesity (appetite suppression), Attention Deficit Hyperactive Disorder (ADHD), and narcolepsy, withdrawn due to abuse. Other derivatives are prescribed for chronic fatique and traumatic brain injury.
  • Ampyrone
    SolvapyrineA, Metapyrazone, Aminoazaphene, Pyronpac, Dipyrone
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Ampyrone was widely used as an antipyretic, and as an analgesic for rheumatism, neuritis and common colds, but replaced due to leucocytopaenia. Dipyrone has veterinary prescription in dogs and horses for mild surgical pain, colic, and fever in foals/ adults. Less often used for musculoskeletal pain. Significant potential to affect performance.
  • Amrinone
    Inocor, Amrinone, Amrinone lactate
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    Amrinone is given intravenously or by bolus dose,as short-term treatment for congestive heart failure; action lasts 1/2 to 2hr (dose-dependent),half-life 5-8hr; 60% renal,20% faecal excretion. Not approved for animal use.
  • Amyl nitrate/nitrite
    Amyl Nitrite Aspirols, Amyl Nitrite Vaporole, Nitrit, Amyl Nitrosum
    Banned
    Click to expand
    Definition: Angina treatment
    Information:
    Amyl nitrite inhalant preparations absorb through lung alveoli for rapid short action (30 seconds onset,lasts 3-5minutes) for angina. High doses cause methaemaglobinaemia. Tolerance develops, rapidly metabolised,renal excretion 1/3 inhaled dose. Not approved for animals.
  • Amylocaine
    Amyleine
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    Amylocaine hydrochloride, originally called Stovaine, is mostly used in spinal anaesthesia; high potential to affect performance.
  • Anabolic Steroid Esters
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Steroid esters of any anabolic steroids listed are also Banned Substances
  • Anastrozole
    Arimidex
    Banned
    Click to expand
    Definition: Aromatase inhibitor
    Information:
    Prescription-only Anastrozole products are first line treatment for post-menopausal breast cancer(mostly hormone-receptor positive), and for gynaecomastia in boys and prepubertal girls. Can reduce bone density.
  • Andarine
    SARM S4, S4 Andarine
    Banned
    Click to expand
    Definition: Selective Androgen Receptor Modulator (SARM)
    Information:
    Andarine is a selective androgen receptor agonist and administration causes muscle growth resulting in increased muscle mass. Andarine was initially produced to treat muscle-wasting diseases.
  • Androstanolone
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An anabolic steroid with no legitimate therapeutic indication in the equine athlete.
  • Androstenediol
    Neumune, Methandriol,5-AED
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    5-Androstenediol was being developed for treatment of radiation sickness. 4-Androstenediol is abused for body-building. Both products have high potential for affecting performance.
  • Androstenedione
    Oxandrolone, Oxandrin, Oxymetholone, Anadrol, Nandoral, Retarbolin, Laurabolin, Stanozolol, Winstrol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Androstenedione is a Schedule III Controlled Substance in USA, banned world-wide from competitive use due to androgeic properties, which significantly affect performance. Therapeutically improves muscle strength and libido, and reduces gynaecomastia in older men. Several derivatives are licensed in veterinary medicine.
  • Androsterone
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A metabolite of testosterone and dihydrotestosterone (DHT) with no legitimate therapeutic indication in the equine athlete.
  • Anileridrine
    Leritine, Adopol, Nipecotan
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    Anileridrine is licensed for medical or veterinary practitioner use as an analgesic, sedative. In pre-anaesthesia it produces relaxation, reduces laryngospasm, and reduces dose of general anaesthetic (like Meperidine, but respiratory depression lifts sooner).
  • Anilopam
    Corlopam, Fenoldopam mesylate
    Banned
    Click to expand
    Definition: Central Nervous System stimulant
    Information:
    Licensed Anilopam-like compounds are used for hypertension, sedation, anti-depressant (stimulant) activity; specific action and potency varies with chemical groupings. All have high potential to affect performance.
  • Anisindione
    Miradon
    Banned
    Click to expand
    Definition: Anticoagulant
    Information:
    Anisindione is prescribed for prophylaxis and/or treatment of venous thrombosis, pulmonary embolism, coronary occlusion and atrial fibrillation with embolism,especially if coumarin not tolerated. No accumulation; clotting activity returns 1-3 days. Not approved for animal use.
  • Anisotropine
    Hyomax-SR, Lytispasm, Endovalpin,Valpin 50, Octatropine, Methyloctatropine bromide
    Banned
    Click to expand
    Definition: Anticholinergic
    Information:
    Anisotropine in high doses reduces gut secretion and motility and bladder, ureter, bile duct and gall bladder tone. Low doses reduce salivary, bronchial, sweat gland secretions, dilate pupils and increase heart rate. Aids peptic ulcer treatment; as premedicant, reduces saliva. Not licensed for animals.
  • Antazoline
    Otrivine, Antistin
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    Antazoline (Phenazoline) in nose and eye drops gives temporary from of nasal congestion, allergic conjunctivitis, rhinitis, and dust mite allergy. Systemic absorption gives sympathomimetic effects: raised blood pressure and heart rate, arrhythmia, nervousness. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Antihistamines (class of drugs)
    Conditionally Permitted
    Click to expand
    Information:
    Some drugs in this classification are considered prohibited and therefore NOT accepted with a Medications Report Form.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Antipyrine
    Allergan, Aurodex, Auroto, Benzotic, Otoalgan, Pro-Otic, Propyphenazone
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Analgesic and antipyretic, Antipyrine was combined with salicylate for relief of pain and fever, may still be used in some dental treatments. Found in many ear preparations for minor pain, itching and wax removal.
  • Apazone (Azapropazone)
    Rheumox, Prolixan, Tolyprin
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Azapropazone is prescribed to relieve pain of rheumatoid arthritis, ankylosing spondylitis and gout where other products fail. Good post-operative analgesic. May cause drowsiness, dizziness and gastric irritation. Plasma levels persist, showing biphasic fall; most excreted unchanged in urine. Not approved for animals.
  • Apocodeine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    Apocodeine has been used as an expectorant, hypnotic and cathartic, which is rapidly absorbed,active (10-20 minutes) and eliminated (half-life 30 minutes). May help Parkinsonism. Recent application for treatment of male impotence and stimulation of male/female libido.
  • Apomorphine
    Apokyn, Apo-Go, Apomorphine
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    Apomorphine is used acutely in veterinary medicine to induce vomiting in small animals after poison ingestion. In human medicine it is used to treat muscle stiffness with Parkinsonism, poor control during 'wearing off' episodes and for low gut mobility. It also attenuates motor deficit after neurotoxin damage. Not approved for equine use.
  • Aprindine
    Amidonal, Aspenon, Fibocil, Fiboran, Ritmusin
    Banned
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    Aprindine is widely prescribed in Europe, North America and Japan for ventricular/supraventricular arrythmias, with nonlinear dose-dependent effects and excretion, largely unchanged, in urine. Not approved for animal use.
  • Aprobarbital
    Alurate, Arbituric acid, Allylpropymal
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Aprobarbital was primarily used for insomnia treatment, although less used than phenobarbital and now rare. Excretion through kidneys depends on urine flow and pH. Testing oral fluids would give higher reading than plasma.
  • Apronalide
    Sedormid, Isodermid
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Apronalide (Apronal) has long been available without prescription for insomnia and nervousness; significant potential to affect performance.
  • Arecoline
    Arecholin, Arecaline, Arekolin, Piperidine alkaloid
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Arecoline was widely given as tapeworm treatment in dogs, but was largely superseded; it expels live worms. Still used for animal surveys and treatment in developing countries. Arecoline hydrobromide improves learning ability and helps verbal and spatial memory in Alzheimers disease (carcinogenic risk). Not approved for use in equines and prohibited by control bodies.
  • Arformoterol
    COPD, Seprocor, Brovana, Foradil Aeriolizer, Formertorel
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Arformoterol nebularisers are used for maintenance treatment of chronic obstructive bronchial disease and emphysema to improve peak expiratory flow rates. Tolerance may develop, and also paradoxical bronchospasms. Mostly metabolised, excretion is by urine and faeces. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Argon
    Banned
    Click to expand
    Definition: Hypoxia Inducible Factor Activator
    Information:
    A noble gas that can be used in hypobaric chambers to produce hypoxia. It has no legitmate therapeutic indication in the equine athlete.
  • Arsenic
    Trisenox, Caparsolate, Histostat, 3-nitro-roxarsone, Pro-Gen Plus, Roxarsone, Sodium Cacodylate solutions, Cocci-Bol-o-tab
    Banned
    Click to expand
    Definition: Stimulant/toxic
    Information:
    Arsenic may only be injected by experienced clinicians for treatment of acute or refractory leukaemia. Arsenamide sodium or thiacetarsenamide sodium is injected by licensed veterinary practitioners to treat heartworm in dogs. Other derivatives are used in swine and poultry feed mixes for improved weight gain, to help control disease (swine flu, blackhead). Added to cattle, sheep and horse supplements to aid convalescense, prevent or treat coccidiosis and enteric infection. Arsenic is a Threshold Substance and a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance.
  • Articaine
    Septocaine, Septanest, Ubistesin,4%Articadent Dental, Deltazine, Bucanest, Septodont
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    Articaine is used world-wide, often in dental practice, for submucosal and regional nerve block injection. Most rapidly hydrolysed to low toxicity metabolite with renal excretion. Pain block precedes function loss.
  • Atenolol
    Temormin, Tenif, Beta-Adalat, Co-Tenidone, Tenolin
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    Atenolol is prescribed in human and small animal veterinary medicine, often combined with other anti-hypertensive and/or diuretic agents, for additive anti-hypertensive effect. In animals it is used for cardiac arrhythmias, hypertrophic cardiomyopathy and obstructive cardiac disease. Doses above therapeutic levels have quinidine-like heart stabilising effect.
  • Atipamezole
    Antisedan, Revertor
    Conditionally Permitted
    Click to expand
    Definition: Alpha adrenergic antagonist
    Information:
    Atipamezole may be used to reverse the effects of sedation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Atomoxetine
    Strattera, Recit
    Banned
    Click to expand
    Definition: Selective noradrenaline re-uptake inhibitor
    Information:
    Atomoxetine HCl improves attentiveness, reduces impulsiveness,and is prescribed for Attention Deficit Hyperactive Disorder (ADHD) treatment in adults only. Not major depressive disorders. Cytochrome enzyme deficiency prolongs plasma clearance; urinary (80%) and faecal excretion.
  • Atracurium
    Atracurium, Atracurium Opopharma, Gelolagar, Tracurix, Tracuran, Tracrium
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    Inhibits neuro-muscular transmission and is used for muscle relaxation after surgical interventions.
  • Atropine
    Atropine, Atro Ofteno, Atropen, Atropinum, Atropisa, Endotropina, Klonatropina
    Conditionally Permitted
    Click to expand
    Definition: Anticholinergic
    Information:
    Atropin may be used in the treatment of uveitis and have anti-spasmodic effects. Atropine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Azacyclonal
    Azacyclonol, Frenquel
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Azaperone
    Eucalmyl, Fluoperidol, Sedaperone Vet, Stresnil, Suicalm
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Azaperone is mainly used as a tranquiliser. It may cause hypotension.
  • Azapetine
    Ilidar
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    Azapetine has an alpha-adrenoceptor blocking effect.
  • Azapropazone (Apazone)
    Cinnamin, Pentosol, Debelex, Prolix, Prolixan, Prolixana, Rheumox, Tolyprin, Sinnamin, Tulyprin, Xani
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Azapropazone has analgesic, anti-inflammatory, and antipyretic effects. It is mainly used in various rheumatic disorders.
  • Azatadine
    Azatadine, Idulamine, Idulian, Lergocil, Optimine, Trinalin, Verbén, Zadine
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    It has anti-muscarinic and anti-serotonin properties, and acts for a long duration. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Azathioprine
    Azamun, Azarek, Azathioprine, Azopi, Imuprin, Satedon, Zytrim
    Conditionally Permitted
    Click to expand
    Definition: Immunosuppressant
    Information:
    Azathioprine may be used to suppress the immune system. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Azosemide
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    A loop diuretic with no legitimate therapeutic indication in the equine athlete
  • Baclofen
    Lioresal
    Banned
    Click to expand
    Definition: Antispasmodic
    Information:
    Used for the symptomatic relief of muscular spasms caused by conditions such as multiple sclerosis.
  • Bambuterol
    Bambec, Bambudil, Oxeol
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    It is a Terbutaline pro-drug.
  • Bamifylline
    Airest, Bamifix, Bami-Med, Bamixol, Briofil, Trentadil
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    It relaxes smooth muscles, relieves bronchospasms, and has a stimulant effect on respiration.
  • Barbital
    Deba, Diemal, Diemalum, Dormonal, Hypnogene, Malonal, Sedeval, Uronal, Veroletten, Verolettin, Veronal, Vesperal
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Used as sedative and hypnotic, especially in its soluble salt form, sodium barbital.
  • Beclamide
    Hibicon, Neuracen, Nydrane, Posedrine, Seclar
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It is used for the control of tonic-clonic seizures and psychomotor epilepsy, and for the management of behaviour disorders.
  • Beclomethasone
    Airbeclosona, Beclacin, Beclometason, Becloval, Clenil-A, Easyhaler Beclometasone, Entyderma, Inalone, Korbutone
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Beclomethasone is used for the management of asthma, and treatment of rhinitis and sinusitis. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Bemegride
    Agipnon, Ahypnon, Antibarbi, Benegrid, Eukraton, Malysol, Megibal, Megimid, Megimide, Mikedimide, Zentraleptin
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used as an anorectic, and has a marked stimulant effect on the central nervous system, particularly on the cerebral cortex.
  • Benactyzine
    Alin, Lucidex, Deprol
    Banned
    Click to expand
    Definition: Anticholinergic
    Information:
    It is used as a hydrocholride in the management of psychoneurotic disorders.
  • Benapryzine
    Brizin
    Banned
    Click to expand
    Definition: Anticholinergic
    Information:
    It has been used in the treatment of Parkinson's disease.
  • Benazepril
    Apo-Benazepril, Benace, Benazepril, Boncordin, Briem, Cibace, Cibacen, Cibacene, Fortekor, Lotensin, Lotrel, Tensanil, Zinadril
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    Benazepril is an anti-hypertensive. It has been rarely used in horses. Benazepril is considered a Class 3A drug by the International Association of Racing Commissioners.
  • Bendroflumethazide
    Aprinox, Neo-NaClex
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    It is used to treat hypertension and oedema in humans, dogs, cats and horses.
  • Benorilate
    Benorilate
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used as an anti-inflammatory and antipyretic medication.
  • Benoxaprofen
    Oraflex, Opren
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is not commonly used in human or veterinary medicine due to adverse side effects.
  • Benoxinate
    Minims Benoxinate, Fluress, Opulets Benoxinate, Prescaina, Novesina, Novesin
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    It is used in applanation tonometry and for fitting contact lenses.
  • Benperidol
    Anquil, Benquil, Concilium, Frenactil, Frenactyl, Glianimon, Glianimon Mite, Psicoben
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used as an anti-psychotic drug to treat antisocial, hypersexual behaviour caused by mental illness. It is also used in the treatment of schizophrenia.
  • Bentazepam
    Tiadipona
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    Bentazepam is an anxiolytic. It is also known as thiadipone. It has anticonvulsant, sedative and skeletal muscle relaxant properties, as well as anxiolytic.
  • Benzocaine (Ethyl Aminobenzoate)
    Americaine, Anaestherit, Anbesol, Capacol, Numzident, Orajel, SensoGARD, Sirop Dentition, Slim Mint, Topicaine, Zilabrace
    Conditionally Permitted
    Click to expand
    Definition: Local anaesthetic
    Information:
    Benzocaine is used for the temporary local relief of pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Benzoctamine
    Tacitin
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It can be used as a sedative for patients with respiratory failure.
  • Benzonatate
    Tessalon Perles, Tessalon capsules
    Banned
    Click to expand
    Definition: Antitussive
    Information:
    Used in humans to prevent or relieve minor coughing, and used in small doses for mouth or pharyngeal pain.
  • Benzoylecgonine
    Esterom
    Banned
    Click to expand
    Definition: Stimulant/cocaine metabolite
    Information:
    Main pharmaceutical ingredient in 'Esterom'" - a prescription drug used topically for relief of muscle spasm and pain."
  • Benzphetamine
    Didrex
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Used in humans to decrease appetite. It is a schedule III drug in the USA.
  • Benzquinamide
    Emeticon, Promecon, Quantril, Quantryl
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    Antihistamine, anti-emetic,mild anticholinergic and a sedative. Benzquinamide antagonises muscarinic acetylcholine receptors and histamine H1 receptors. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Benzthiazide
    Dytide, Dyrenium Compositum
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    It was used in humans to treat high blood pressure and oedema, however is no longer available in the US.
  • Benztropine
    Cogentin
    Banned
    Click to expand
    Definition: Anticholinergic
    Information:
    It is used to treat Parkinson's disease and idiopathic or secondary dystonia.
  • Benzydamine
    Tantum Verde, Difflam, Benflogin, Androlex, Androlex-C
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used topically to treat mouth ulcers.
  • Benzylpiperazine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used by humans as a recreational drug for its euphoric and stimulant properties. It is illegal in the United States, Australia, New Zealand, Ireland and some parts of Europe. This is a substance deemed to have no legitimate use in equine medicine.
  • Bepridil
    Vascor, Bepadin
    Banned
    Click to expand
    Definition: Calcium channel blocker
    Information:
    It was used in humans to treat angina but now not commonly used due to possibly inducing arrhythmias. It only has a mild potential to affect perfomance.
  • Betamethasone
    Bebyderm, Becort, Bedifos, Betacorlan, Betacortril, Betafoam, Betagen, Betamamallet, Betamethason, Betapred, Betasolon, Betnasol, Betsolan, Celestamine N, Celestene, Celestone, Cevicort, Coritex, Cortimar, Flubenisolone, Hormezon, Konicortil, Luxiqo, Medobeta, Methazon, Steromien
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Betamethasone is used as an anti-inflammatory and anti-allergic agent for the treatment of dermatological, rheumatic and allergic diseases. The detection time is estimated with 168 hours (7 days) for intra articular administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Betaprodine
    Prisilidine, Nisentil
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    Betaprodine was not developed for medicinal use. As an opioid analgesic, betaprodine would have a high potential to affect performance.
  • Betaxolol
    Betoptic, Betoptic S, Lokren, Kerlone
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    It is used topically to treat glaucoma and is approved by the US Food and Drug Administration for ocular use as a 0.5% solution. Also used to treat hypertension. Has a mild potential to affect athletic performance.
  • Bethanechol
    Duvoid, Myotonachol, Urecholine
    Conditionally Permitted
    Click to expand
    Definition: Parasympathomimetic
    Information:
    Bethanechol may be used in the treatment of urinary retention. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Bethanidine
    Batel, Benzoxine, Betaling, Bethanid, Esbatal, Eusmanid, Hypersin
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    It is used to treat hypertension. Bethanidine has the potential to affect performance.
  • Biperiden
    Akineton, Akinophyl, Bikipen, Darcipireno, Roloken, Sinekin
    Banned
    Click to expand
    Definition: Anticholinergic
    Information:
    It is used to treat Parkinson's disease.
  • Biphenamine
    Biphenamine hydrochloride, Salol, Sébaklen
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used for treatment of inflammed eyes in humans, and also used in treatment of seborrhea capitis. Potential to affect horse performance is not known.
  • Biriperone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Bisoprolol
    Bisoprolol, Cardicor, Emcor, Fondril, Vivacor
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    It is used to treat moderate to severe heart failure. Bisoprolol will give a positive result in doping tests in human athletes.
  • Bitolterol
    Tornalate, Bitolterol
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    It is used in treatment of bronchospasms in humans, in conditions including asthma and chronic obstructive pulmonary disease. It has a rapid onset action,and may last up to 6-8 hours.
  • Bolandiol
    Anabiol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    It is used as a 'body building'" supplement and it is included in the UK Misuse of Drugs Act - Part III Class C. It has performance enhancing qualities and is not approved for use with horses."
  • Bolasterone
    Myagen
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    It was originally used as an oral steroid by body builders in Europe.
  • Boldenone
    Equipoise, Ganabol, Equigan, Ultragan
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    It has been used in the treatment of horses (originally designed for veterinary use)
  • Boldione
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Bretylium
    Darenthin, Darentin, Ornid
    Banned
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    It should only be used in hospital intensive care units due to the potential side effects.
  • Brimonidine
    Alphagan, Apo-Brimonidine, Enidin, Oftalmotonil
    Banned
    Click to expand
    Definition: Occular antihypertensive
    Information:
    It is used for lowering intraocular pressure.
  • Brinzolamide
    Azopt, Azoptic
    Conditionally Permitted
    Click to expand
    Definition: Diuretic
    Information:
    Brinzolamide may be used to reduce intraocular pressure in the treatment of glaucoma. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Bromantan
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Developed by the former Soviet Union for use by the armed forces. Will affect performance of athletes.
  • Bromazepam
    Lexotan, Brazepam, Bromaze, Lectopam
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used in the treatment of anxiety and insomnia.
  • Bromfenac
    Bronuck, Duract, Xibrom
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Available in an ophthalmic solution.
  • Bromhexine
    Brometix, Bromexidryl, Bronacim, Broncocalmine, Brondilax, Catarrosine, Clarus, Dibroxin, Expectosan Extra Forte, Flumed, Funciobron B, Inquixol, Lisi-Tos, Lubrirhin, Namir, Pectoral Pagliano, Tolmix, Toridran-N, Toscalmin, Tostop
    Conditionally Permitted
    Click to expand
    Definition: Mucolytic
    Information:
    Bromhexine may be used in the treatment of respiratory disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Bromisovalum
    Corvalol
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It is imported from Russia, and is an unapproved drug.
  • Bromocriptine
    Parlodel
    Banned
    Click to expand
    Definition: Dopamine agonist
    Information:
    It is used in dogs for abortion, and in horses for treatment of pseudopregnancy and pituitary-dependent hyperadrenocorticism. It has a high potential to affect athletic performance.
  • Bromodiphenhydramine
    Amodryl, Bromanautine, Bromo-Benadryl, Bromo-Benzdryl, Deserol, Histabromamine, Neo-Benadryl
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    It is used to manage symptoms related to allergies. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Bromophenethylamine
    4-Bromophenethylamine
    Banned
    Click to expand
    Definition: Psychedelic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Bromperidol
    Bromidol, Impromen, Tesoprel
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used in human medicine for the treatment of schizophrenia.
  • Brompheniramine
    Bromfed, Dimetapp, Bromfenex, Dimetane
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Brompheniramine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Brotizolam
    Bondormin, Brotizolam, Dormex, Indormyl, Ladormin, Lendorm, Lendormin, Lendormine, Lindormin, Maderantil, Nimbisan, Noctilan, Sintonal
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used in the treatment of insomnia. It is approved for sale in the Netherlands, Germany, Portugal, Italy and Japan, but not in the UK, USA or Canada.
  • Bucetin
    Betadid
    Banned
    Click to expand
    Definition: Analgesic/antipyretic
    Information:
    It is an analogue of Phenacetin and has been withdrawn from the market.
  • Buclizine
    Aphilan R, Bucladin, Longifene, Migraleve, Postafen
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    It is used in combination with two other drugs to treat migraines. Its affect on athletic performance is not known. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Budesonide
    Rhinocort, Pulmicort, Entocort, Noex
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Budesonide is used to treat non-infectious rhinitis and nasal polyps. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Bufexamac
    Allergipuran N, Droxaryl, Duradermal, Ekzemase, Malipuran, Parfenac, Viafen
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used for joint and muscle pain.
  • Buflomedil
    Bufedil, Buflan, Defluina, Flomed, Fonzylane, Irrodan, Lofton, Loftyl, Sinoxis
    Banned
    Click to expand
    Definition: Vasoactive agent
    Information:
    It is used in the treatment of peripheral arterial diseases.
  • Bufotenine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Naturally occurring hallucinogen
    Information:
    Found in the skin of some species (toads) and in mushrooms. Used for psychedelic effects in recreational circumstances. Bufotenine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance.
  • Bumetanide
    Aquazone, Bumex, Burinex, Butinat, Cambiex, Diurama, Farmadiuril, Fontego, Fordiuran, Lunetoron
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Used to treat heart failure, but also used to mask other drugs and/or steroids by diluting urine.
  • Bunitrolol
    Betrilol, Stresson
    Banned
    Click to expand
    Definition: Beta adrenergic antagonist
    Information:
    It has similar properties to those of Propranolol.
  • Bunolol
    Ophtho-Bunolol
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    Beta blocker which is therefore an antihypertensive agent.
  • Buphenine (Nylidrin)
    Arlibide, Arlidin, Diatolil, Dilatol, Dilydrin, Dilydrine Retard, Opino, Penitardon, Perdilatal Forte, Tocodilydrin, Tocodrine
    Banned
    Click to expand
    Definition: Sympathomimetic
    Information:
    Sympathomimetic and beta-adrenergic agonist. It causes peripheral vasodilation and has a positive ionotropic effect. It may affect performance.
  • Bupivacaine
    Bupivacaine, Carbostesin, Duracaina, Marcaine, Sensorcaine
    Conditionally Permitted
    Click to expand
    Definition: Local anaesthetic
    Information:
    Bupivacaine is used for the temporary local relief of pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Bupranolol
    Betadrenol, Ophtorenin
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    It has similar properties to those of Propanolol.
  • Buprenorphine
    Buprenex, Buprenorphine, Finibron, Prefin, Temgesic
    Conditionally Permitted
    Click to expand
    Definition: Opioid
    Information:
    Buprenorphine may be used to relieve pain With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Bupropion
    Wellbutrin
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    An antidepressant which acts by inhibiting re-uptake of norepinephrine and dopamine and blocks nicotinic receptors. The structure of the metabolites closely resembles amphetamine, therefore may cause false positive amphetamine urine tests.
  • Buspirone
    Ansial, Ansiced, Anxiolan, Axoren, BuSpar, Buspirone, Loxapin, Pasrin, Tendan
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    Anxiolytic and antidepressant. It works by partially blocking serotonin 5-hydroxatryptamine receptors.
  • Butabarbital
    Buticaps, Butisol, Ciprial, Mebutal, Paxital, Prelital
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Rarely used in human medicine, but is for the treatment of severe insomnia and relieving anxiety.
  • Butacaine
    Bal, Relaxoddi
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Butalbital
    Axocet, Fioricet, Axotal, Fiorinal
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It is commonly used in combination, usually with paracetamol or aspirin, for the treatment of pain and headaches.
  • Butamben
    Butamben, Homeodose, Nestosyl, Prurex, Topicaina
    Banned
    Click to expand
    Definition: Nerve blocker
    Information:
    Used for surface anaesthesia.
  • Butanilicaine
    Hostacain
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    Local anaesthetic. Listed in the Association of Racing Commissioners (USA) as having a high potential to affect performance.
  • Butaperazine
    Emerex, Megalectil, Randolectil, Repoise
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    No recognised use in the veterinary market.
  • Butoctamide
    Listomin
    Banned
    Click to expand
    Definition: Serotonin release stimulation
    Information:
    No known use in veterinary medicine. Used in human medicine to treat insomnia, manic-depressive illness and schizophrenia.
  • Butofilolol
    Cafide
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    It has similiar properties to those of Propanolol and is used in the management of hypertension.
  • Butorphanol
    Beforal, Butorphanol, Butrum, Moradol, Stadol, Torbugesic, Torbutrol, Verstadol
    Conditionally Permitted
    Click to expand
    Definition: Opioid
    Information:
    Butorphanol may be used to relieve pain and in anaesthetic premedication. The detection time is estimated at 72 hours (3 days) following intravenous administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgement and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian). With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Butoxycaine
    Stadacain
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    It is used in human medicine for mucosal analgesia in urology.
  • Butylscopolamine
    Buscopan
    Conditionally Permitted
    Click to expand
    Definition: Anticholinergic
    Information:
    Butylscopolamine may be used to treat spasms within the digestive tract. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Cafedrine
    Akrinor, Bifort, Praxinor
    Banned
    Click to expand
    Definition: Analeptic
    Information:
    It is used to increase the blood pressure of people with low blood pressure.
  • Caffeine
    Horse Power X, Exceed
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Caffeine may stimulate the central nervous system and cardiac muscle Caffeine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Calcium Dobesilate
    Dexium, Dobesifar, Doxium
    Conditionally Permitted
    Click to expand
    Definition: Vasoprotective
    Information:
    Calcium dobesilate may be used in the treatment of orthpaedic disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Calusterone
    Methosorb
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Originally tested in people with breast cancer, however more recent research found no advantages, and it is not commonly used. Only recognised as having a small potential to affect athletic performance.
  • Camazepam
    Paxor, Albego, Limpidon
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It has anxiolytic, anticonvulsant, sedative and skeletal muscle relaxant properties.
  • Canagliflozin
    Invokana
    Conditionally Permitted
    Click to expand
    Definition: Anti-hyperglycaemic
    Information:
    Canagliflozin may be used in the treatment of equine metabolic syndrome. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Candesartan
    Amias, Atcand, Ratacand, Blopress
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    It is used in humans with hypertension and heart failure.
  • Cannabidiol (CBD, CBDA)
    Epidiolex, Epidyolex
    Banned
    Click to expand
    Definition: Cannabinoid
    Information:
    Cannabidiol (CBD, CBDA) may be used in the control of pain and neurological disorders. Cannabidiol (CBD, CBDA) is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Cannabis - natural cannabinoids (except for cannabidiol), synthetic cannabinoids and other cannabimimetcs
    Sativex, Marinol, Cesamet
    Banned
    Click to expand
    Definition: Psychotropic
    Information:
    Used illegally by people for recreation. Is available under prescription for its analgesic properties in some countries. Natural cannabinoids, synthetic cannabinoids and other cannabimimetics are Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance.
  • Canrenone
    Inspra
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    It is used in human medicine as a treatment for arterial hypertension and congestive heart failure.
  • Capsaicin
    Axsain, Benejoint, Capsaicin, Capsicin, Capsig, Dolorac, Hansaterm, Theragen, Zostrix
    Banned
    Click to expand
    Definition: Topical analgesic/irritant
    Information:
    It is used as a neuropharmacological tool in topical ointments for pain relief. It has also hypersensitizing properties.
  • Captodiame
    Covatine, Covatix
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used for the treatment of anxiety and tension.
  • Captopril
    Capoten, Capolen
    Conditionally Permitted
    Click to expand
    Definition: Angiotensin-converting enzyme inhibitor
    Information:
    Captopril may be used to treat hypertension and heart failure. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Caramiphen
    Ordrine AT, Rescaps-D, Tuss Vernade
    Banned
    Click to expand
    Definition: Anticholinergic
    Information:
    It is used to treat the common cold in humans.
  • Carazolol
    Carbacel, Conducton
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    It has similar properties to those of Propanolol and is used in the treatment of hypertension.
  • Carbachol
    Doryl, Carbastat, Carboptic, Miostat
    Banned
    Click to expand
    Definition: Parasympathomimetic
    Information:
    It is used to lower intraocular pressure.
  • Carbamazepine
    Tegretol, Biston
    Conditionally Permitted
    Click to expand
    Definition: Anticonvulsant
    Information:
    Carbamazepine may be used in the control of headshaking. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Carbazochrome
    Adrenoplasma, Adrenoxil, Adrenoxyl, Adrezon, Cromoxin, Siochrome Injections, Styptocid Injections
    Banned
    Click to expand
    Definition: Haemostatic
    Information:
    It is used in the treatment of hemorrhoids.
  • Carbetapentane (Pentoxyverine)
    Balsoclase, Germapect, Merol, Pectosan Toux Seche, Sirop Pectoral Vicks, Toclase Toux Seche, Tussa-Tablinen, Vicks Pectoral
    Banned
    Click to expand
    Definition: Antitussive
    Information:
    It is used to relieve sneezing/rhinitis in humans.
  • Carbidopa
    Lodosyn, Sinemet
    Banned
    Click to expand
    Definition: Di hydroxythenylalanine decarboxylase inhibitor
    Information:
    Carbidopa is used to inhibit peripheral metabolism of levodopa in the treatment of Parkinson's disease.
  • Carbimazole
    Athyromazole, Basolest, Camazol, Carbimazol, Carbistad, Cazole, Neo-Mercazole, NeoMercazole, Neo-Morphazole, Neo-Tireol, Neo Tomizol
    Banned
    Click to expand
    Definition: Antihyperthyroidism
    Information:
    It is used to treat hyperthyroidism.
  • Carbinoxamine
    Clistin, Palgic
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    It is used in humans to treat hay fever. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Carbon Dioxide (CO2)
    Conditionally Permitted
    Click to expand
    Definition: Inorganic Compound
    Information:
    Carbon dioxide may be used in the treatment of metabolic disorders and wounds. Carbon dioxide is a Threshold Substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Carbromal
    Adalin, Diacid, Mirfudorm
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Sedative/hypnotic. It has a high potential to affect athletic performance and its use is prohibited in athletic sport.
  • Carbuterol
    Broncotrate, Bronsecur, Dynavent, Pirem, Rispran
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    A beta2-adrenergic receptor agonist Bronchodilator. It may affect performance.
  • Carfentanil
    Wildnil
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    No generally accepted medical use.
  • Carisoprodol
    Soma-tabs
    Banned
    Click to expand
  • Carphedon (Phenylpiracetam)
    Phenotropil
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used to improve encephalopathic conditions and to increase physical stamina, as well as tolerance to cold.
  • Carphenazine
    Procethazine, Proketazin, Proketazine
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Used in the treatment of acute or chronic schizophrenic reactions in hospitalised patients.
  • Carpipramine
    Prazinil, Defekton
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    This drug is indicated for the treatment of schizophrenia.
  • Carprofen
    Imadyl, Rimadyl
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Carprofen may be used to relieve pain and inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Carteolol
    Cartrol, Ocupress, Teoptic, Arteolol, Arteoptic, Calte, Cartéabak, Carteol, Cartéol, Cartrol, Elebloc, Endak, Glauteolol, Mikelan, Poenglaucol, Singlauc
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    It is used to treat glaucoma in humans.
  • Carticaine
    Articaine, Septocaine, Ultracaine
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    Articaine is a dental local anaesthetic. It is the most widely used local anaesthetic in a number of European countries, and is available in many countries around the world.
  • Carvedilol
    Coreg, Dilatrend, Eucardic, Carloc, Coreg CR
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    It is indicated in the treatment of mild to moderate congestive heart failure (CHF) in humans.
  • Cathine (Norpseudoephedrine)
    Amorphan, Appetrol, Dietene, Miniscap, Nobese, Thinz
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used as an anorectic agent and to reduce appetite.
  • CBD (Cannabidiol; CBDA)
    Banned
    Click to expand
    Definition: Cannabinoid
    Information:
    CBD (Cannabidiol; CBDA) may be used in the control of pain and neurological disorders. CBD (Cannabidiol; CBDA) is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • CBDA (CBD; Cannabidiol)
    Banned
    Click to expand
    Definition: Cannabinoid
    Information:
    CBDA (Cannabidiol; CBD) may be used in the control of pain and neurological disorders. CBDA (Cannabidiol; CBD) is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Celecoxib
    Celebrex, Celebra, Onsenal
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used in the treatment of osteoarthritis, rheumatoid arthritis, acute pain, painful menstruation and menstrual symptoms. It is also used to reduce numbers of colon and rectum polyps in patients with familial adenomatous polyposis.
  • Celiprolol
    Cardem, Celectol, Celipres, Celipro, Celol, Cordiax, Dilanorm, Selectol
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    It is used in the treatment of high blood pressure in human medicine.
  • Cephaeline
    Ipecac
    Banned
    Click to expand
    Definition: Emetic
    Information:
    It is used as an alkaloid to induce vomiting.
  • Ceterizine (Cetirizine)
    Cetryn, Hitrizin, Setir, Virlix, Ziptek, Zirtek, Zyrlex, Zyrtec
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Ceterizine may be used in the control of allergies and is the active metabolite of hydroxyzine. The detection time is estimated at 96 hours (4 days) following oral administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgement and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Cetirizine (Ceterizine)
    Cetryn, Hitrizin, Setir, Virlix, Ziptek, Zirtek, Zyrlex, Zyrtec
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Cetirizine may be used in the control of allergies and is the active metabolite of hydroxyzine. The detection time is estimated at 96 hours (4 days) following oral administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgement and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Chloral betaine
    Beta-Chlor, Welldorm
    Banned
    Click to expand
    Definition: Sedative
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Chloral hydrate
    Aquachloral, Chloradorm, Chloraldurat, Chloralex, Chloralvan, Dormel, Equithesin, Novo-Chlorhydrate, Rectules
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It was used for the short-term treatment of insomnia, and as a sedative before minor medical or dental treatment. Used as an ingredient in the veterinary anaesthetic Equithesin. Equithesin was effectively administered intra-venously, and for many years was the most commonly used injectable anaesthetic in horses.
  • Chloralbutanol
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Topical analgesic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Chlorcyclizine
    Alergicide, Di-Paralen, Diparalene, Eramide, Histantine, Perazil, Perazyl, Piparalene
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    Used in treatment of motion sickness. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Chlordiazepoxide
    Klopoxid, Librax, Libritabs, Librium, Mesural, Multum, Novapam, Risolid, Silibrin, Sonimen, Tropium, Zetran
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    A sedative/hypnotic drug and benzodiazepine derivative. Chlordiazepoxide has a medium to long half-life, but its active metabolite has a very long half-life. The drug has amnestic, anxiolytic, hypnotic and skeletal muscle relaxant properties.
  • Chlormadinone acetate
    Banned
    Click to expand
    Definition: Hormone - progestagen
    Information:
    Clordion, Gestafortin, Lormin, Non-Ovlon, Normenon, Verton
  • Chlormerodrin
    Chlormerodrin HG 197, Diurone, Katonil, Mercardox, Mercloran, Mercoral, Merculest, Merilid, Neogidrin, Neohydrin, Oricur, Promeran, Promerane
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Radiolabelled form has been used as a diagnostic and research tool.
  • Chlormethiazole
    Distraneurin, Hemineurin, Heminevrin
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It is used in the treatment of confusion, agitation, restlessness, sleeping disorders, and in the treatment of acute alcohol and drug withdrawal symptoms.
  • Chlormezanone
    Alinam, Fenarol, Lyseen New, Miorilax, Myoflex, Trancopal, Tranrilax
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    Its use was discontinued in many countries in 1996, due to rare, but serious cases of toxic epidermal necrolysis.
  • Chloroform
    Freon 20, Esoform Alcolico, Esoform, Freezex Hoof Freeze, Sekumatic, Stom-Antiba, Stomyteol, Vicks Acta Plus
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It was mainly used as an anaesthetic. It depresses a patient's central nervous system, causing dizziness, fatigue and unconsciousness. It is not routinely used in modern medicine.
  • Chlorophenesin
    Adermykon, Demykon, Gechophen, Maolate, Mycil
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    It has also been used in topical applications approved by the World Health Organisation due to some antibacterial and antifungal properties.
  • Chlorophenyl piperazine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Psychoactive
    Information:
    It has been detected in pills touted as legal alternatives to illicit stimulants in New Zealand, and pills sold as ecstasy in Europe and the United States. It is illegal.
  • Chloroprocaine
    Nesacaine, Nesacaine-MPF
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    It is given by injection during surgical procedures, and during labour and delivery in human medicine.
  • Chloropyramine
    Avapena, Allergan S, Anaphylline, Nilfan, Sinopen, Suprastin, Synopen, Synopen R, Synpen
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    Approved in some Eastern European countries for the treatment of allergic conjunctivitis, allergic rhinitis, bronchial asthma, and other atopic (allergic) conditions. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Chloroquine
    Avlochlor, Chloroin, Resorchin, Sanoquin, Trochin
    Banned
    Click to expand
    Definition: Antimalarial
    Information:
    It is used in the treatment or prevention of malaria.
  • Chlorothiazide (Chlorthiazide)
    Azide, Chlotride, Diuril Boluses, Flumen, Lyovac Diuril, Saluretil, Saluric, SK-Chlorothiazide
    Conditionally Permitted
    Click to expand
    Definition: Diuretic
    Information:
    Chlorothiazide (chlorothiazide) may be used in the control of hypotension and oedema. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Chlorpheniramine
    Alerdil, Allergex, Allergican, Apomin, Chlor-Trimeton, Chlorphen-12, Chloropiril, Chlorphenamine, Hayleve, Methyrit, Piriton, Prodel, Teldrin Allergy
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Chlorpheniramine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Chlorphenoxamine
    Clorevan, Spirbon, Systral, Systrason, Ultratussin
    Banned
    Click to expand
    Definition: Antipruritic
    Information:
    It is used in the treatment of idiopathic, arteriosclerotic, and postencephalitic Parkinsonism, usually with the concomitant administration of other anti-Parkinsonian agents.
  • Chlorphentermine
    Apsedon, Desopimon, Lucofen
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Stimulant drug used as an appetite suppressant. It is a relatively weak stimulant, which little potential for abuse.
  • Chlorproethazine
    Neuriplege
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    Antihistamine, antipsychotic and skeletal muscle relaxant. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Chlorpromazine
    Thorazine, Largactil
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It effectively treats schizophrenia, severe mania in people with bipolar disorder, and uncontrollable hiccups.
  • Chlorpropamide
    Bioglumin, Chloronase, Clordiabet, Diabemide, Diabenal, Diabet, Diabines, Diabinese, Gliconorm, Glucamide, Glymese, Hypomide, Insulase, Millinese, Normoglic, Novo-Propamide, Stabinol
    Banned
    Click to expand
    Definition: Antidiabetic
    Information:
    It is used to treat type 2 diabetes mellitus.
  • Chlorprothixene
    Tactaran, Tarasan, Truxal, Vetacalm
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Its principal indications are the treatment of psychotic disorders (e.g. schizophrenia), and for treatment of depression.
  • Chlorthalidone
    Axamin, Higrotona, Hydro-Long, Hydroton, Igroton, Novo-Thalidone, Odemo-Genat, Renidone, Renon, Thalitone, Uridon, Urolin, Zambesil
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    It is often used in the management of hypertension and oedema in humans.
  • Chlorthenoxazine
    Apirogen, Betix, Ossazin, Ossazone, Ossipirina, Reugaril, Reulin, Reumital
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It has been used for the treatment of rheumatic disorders.
  • Chlorthiazide (Chlorothiazide)
    Azide, Chlotride, Diuril Boluses, Flumen, Lyovac Diuril, Saluretil, Saluric, SK-Chlorothiazide
    Conditionally Permitted
    Click to expand
    Definition: Diuretic
    Information:
    Chlorothiazide (chlorothiazide) may be used in the control of hypotension and oedema. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Chlorzoxazone
    Muscol, Parafon Forte, Paraflex
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    Used in humans to relax muscles and relieve pain and discomfort associated with strains, sprains, spasms or other muscle injuries.
  • Ciclesonide
    Alvesco, Omnaris, Omniair, Aservo EquiHaler
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Ciclesonide is used in the control of allergic disease e.g. asthma. The detection time is estimated with 120 hours (5 days) after inhalational administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horses system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Cicloprofen
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Cilazapril
    Inhibace
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    It is used for the treatment of hypertension and congestive heart failure.
  • Cilostazol
    Pletal
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    It is used in the alleviation of the symptom of intermittent claudication in individuals with peripheral vascular disease.
  • Cimaterol
    Cimaterol LD50
    Banned
    Click to expand
    Definition: Beta agonist
    Information:
    Stimulant and fat burning.
  • Cinchocaine
    Proctosedyl, Cincain, Nupercainal, Nupercaine, Sovcaine
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    It is the active ingredient in some topical hemorrhoid creams. It is also a component of the veterinary drug Somulose, used for euthanasia of horses and cattle.
  • Cinchophen
    Atophan, Quinophan, Phenaquin
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It used to be used in human and veterinary medicine to treat gout.
  • Cinnarizine
    Stugeron, Stunarone
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    Mainly used for the control of vomiting caused by motion sickness. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Citalopram
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Clanobutin
    Conditionally Permitted
    Click to expand
    Definition: Choleretic
    Information:
    Clanobutin may be used in the management of digestive tract diseases With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Clemastine
    Agasten, Dexa Tavegil, Meclastin, Mecloprodin, Tavegil, Tavegyl
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    It is used for the treatment of allergic rhinitis. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Clemizole
    Alercur, Allerpant, Histacur, Histakool
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    Antipruritic drug used in human medicine. Undergoing trials for potential treatment of hepatitis C in humans. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Clenbuterol (Ventipulmin)
    Bronq-C, Broncodil, Clenasma, Cesbron, Clenbutol, Contrasmina, Monores, Prontovent, Spiropent
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Clenbuteral may be used in the treatment of respiratory diseases. The detection time is estimated with 168 hours (7 days) after oral administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Clibucaine
    Batramycine, Batrax
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Clidinium
    Librax, Quarezan, Clindex
    Banned
    Click to expand
    Definition: Anticholinergic
    Information:
    It may help symptoms of cramping and abdominal/stomach pain by decreasing stomach acid, and slowing the intestines.
  • Clobazam
    Frisium, Urbanol
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    Actions and uses similar to those of Diazepam.
  • Clobenzorex
    Asenlix, Dinintel, Finedal, Rexigen
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Used as an anorectic. High potential for affecting performance, and for abuse.
  • Clobetasol
    Cantril, Clobetasolpropionat Mikron, Koniderm
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Clobetasol is used in the treatment of various skin disorders. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Clocapramine
    Clofekton
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    Used in human medicine for the treatment of schizophrenia.
  • Clocortolone
    Cloderm Cream
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    Used to treat dermatitis (topical application).
  • Clodronate
    Osphos
    Conditionally Permitted
    Click to expand

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Clodronate Disodium
    Conditionally Permitted
    Click to expand

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Clodronic Acid
    Osphos
    Conditionally Permitted
    Click to expand
    Definition: Bisphosphonate
    Information:
    Clodronic acid may be used in the treatment of orthopaedic disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Clofenamid
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Carbonate anhydrase inhibitor
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Clomethiazole
    Chloro-S.C.T.Z., Distraneurin, Emineurina, Heminevrin, Somnevrin
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It is used in the treatment of confusion, agitation, restlessness, sleeping disorders, and in the treatment of acute alcohol and drug withdrawal symptoms.
  • Clomiphene
    Clomid, Serophene, Milophene
    Banned
    Click to expand
    Definition: Oestrogen receptor modulator
    Information:
    It is used mainly for ovarian stimulation in human female infertility. It is also commonly used by male anabolic steroid users to bind the oestrogen receptors in their bodies.
  • Clomipramine (Clomiprimine)
    Anafranil, Clopress, Maronil, Tranquax, Zoiral
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    Used in humans to treat obsessive–compulsive disorder (OCD) and depression, it has been used in dogs to treat separation anxiety. Widely used for the treatment of disturbed behaviour in dogs and cats.
  • Clomiprimine (Clomipramine)
    Anafranil, Clopress, Maronil, Tranquax, Zoiral
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    Used in humans to treat obsessive–compulsive disorder (OCD) and depression, it has been used in dogs to treat separation anxiety. Widely used for the treatment of disturbed behaviour in dogs and cats.
  • Clonazepam
    Klonopin, Ravotril, Rivotril, Rivatril
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used in human medicine to treat epilepsy.
  • Clonidine
    Catapres, Catarpresan, Catarpres-TTS, Clonistada, Dixarit, Ipotensium, Isoglaucon
    Conditionally Permitted
    Click to expand
    Definition: Antihypertensive
    Information:
    Clonidine may be used as a sedative or in the treatment of pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Clonixin
    Clonix, Dolalgial, Dorixina, Traumicid
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Used for the treatment of chronic arthritic conditions and certain soft tissue disorders associated with pain and inflammation in humans.
  • Clopamide
    Adurix, Aquex, Brinaldix
    Banned
    Click to expand
    Definition: Dopamine antagonist
    Information:
    A thiazide like drug which works in similar way to thiazide diuretics.
  • Clopidogrel
    Plavix
    Conditionally Permitted
    Click to expand
    Definition: Anti-platelet agent
    Information:
    Clopridogrel may be used to prevent abnormal blood clot formation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Cloranolol
    Tobanum
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Clorazepate
    Tranxene, Novo-Clopate, Clorazepate
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used in the treatment of anxiety disorders and insomnia. It may also be prescribed as an anticonvulsant or muscle relaxant.
  • Clormecaine
    Placacid
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Clorprenaline
    Asthone, Bazarl, Broncon, Cosmoline, Effectol, Calutein, Pentadoll, Restanolon
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    It is used as a bronchodilator and has general properties similar to those of Isoprenaline. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Clostebol
    Anabolit, Macrobin, Stearanabol, Sterabol, Test-Anabol, Testomed, Trofodermin-S, Turinabol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Clothiapine
    Entumin, Entumine, Etomine, Etumina, Etumine
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    It is used for the treatment of psychoses.
  • Clotiazepam
    Clozan, Distensan, Trecalmo, Rize, Rizen, Veratran
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used for the treatment of anxiety and tension. It is not approved for sale in the United States or Canada.
  • Cloxazolam
    Sepazon, Olcadil, Akton, Lubalix
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used for the treatment of anxiety.
  • Clozapine
    Clozaril, Leponex, Fazaclo, Froidir, Denzapine, Zaponex, Klozapol, Clopine
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Used to treat schizophrenia in humans.
  • Cobalt
    Conditionally Permitted
    Click to expand
    Definition: Chemical element
    Information:
    Cobalt is naturally occurring but also found in vitamin and mineral supplements as Vitamin B12. It may be used to increase the number of red blood cells and haemoglobin. Cobalt is a Threshold Substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Cocaine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant/local anaethestic
    Information:
    Illegal and high potential to affect performance and drug abuse.
  • Codeine
    Analgiol, Bronchoforton Kodeinsaft, Codicaps, Codicept, Codiforton, Codocalyptol, Coducept, Eulyptan, Pneumogenol, Tussipect Mono
    Conditionally Permitted
    Click to expand
    Definition: Opioid
    Information:
    Codeine may be used to relieve pain and to treat diarrhoea. Codeine is a Specified Substance when detected in the presence of morphine. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Colchicine
    Colchicine, Colcin, Colgout, Goutichine, Prochic, Reugot, Ticolcin
    Banned
    Click to expand
    Definition: Rheumatic treatment/anti-cancer
    Information:
    Cochicine is considered a Specified Substance. It is used in human medicine for the treatment of acute flares of gout and familial Mediterranean fever. Also used in the treatment of irritable bowel syndrome.
  • Conorphone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It is an analogue of hydrocodone, somewhat more potent than codeine in analgesic effects, but more side effects associated with it.
  • Coroxon
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Anticoagulant
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Cortisone
    Cortelan, Cortisone, Cortisyl, Cortogen, Cortone
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Cortisone is used in the treatment of a number of different diseases such as severe allergies and skin problems, asthma and arthritis. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Cortivazol
    Altim, Diaster, Dilaster, Idaltim
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It has anti-inflammatory and immunosuppressant properties.
  • Cotinine
    Nicoret, Nicorette
    Banned
    Click to expand
    Definition: Nicotine metabolite
    Information:
    It has been studied for effectiveness in treating schizophrenia, Alzheimer's and Parkinson's diseases. Not used in veterinary medicine.
  • Coumarin
    Coumarin, Coumarinum, Esberiven Application, Lodema, Lymphex, Lysedem, Venalot Mono, Venium
    Banned
    Click to expand
    Definition: Anticoagulant
    Information:
    It has clinical medical value as the precursor to several anticoagulants, including warfarin.
  • Cromoglycate
    PMS-Sodium Cromoglycate
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Cromoglycate may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Cromolyn
    Alergocrom, Alerion, Colimune, Cromantal, Cromese, Cromoglicin, Cromosol, Cropoz, Dilospir, Fenistil Eye Drops, Flenid, Gastrofrenal, Lomusol, Opticrom, Vividrin
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Cromoglycate may be used in the control of allergies. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Cropropamide
    Respirot
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Used in combination with crothethamide.
  • Crotehamide
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Used in combination with cropropramide. Used for respiratory stimulation.
  • Cyamemazine
    Cianatil, Tercian
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used for the treatment of neuro-psychiatric disorders. Not commonly used in veterinary medicine, and has a high potential to affect athletic performance.
  • Cyclandelate
    Cyclospasmol
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    It is used in various blood vessel diseases, e.g. claudication, arteriosclerosis and Raynaud's disease.
  • Cyclizine
    Echnatol, Merazine, Valoid
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    Used to treat nausea, vomiting and dizziness associated with motion sickness, vertigo and post-operatively, following general anaesthesia and opioid administration. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Cyclobarbital
    Fanodormo Calcico, Phanodorm, Somnupan C
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It is used for the treatment of epilepsy and as a narcotic. Not commonly used in veterinary medicine, and has a high potential to affect performance.
  • Cyclobenzaprine
    Apo-Cyclobenzaprine, Flexeril, Fexmid
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    Usually prescribed to relieve pain and muscle spasms.
  • Cyclofenil (Cyclophenil)
    Fertodur, Menopax, Neoclym
    Banned
    Click to expand
    Definition: Anti-oestrogenic
    Information:
    It is used in the treatment of menstrual disorders, menopausal symptoms and abovulatory infertility. Cyclofenil acts as a modulator of estrogen receptors. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Cycloguanil
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Antimalarial
    Information:
    Used in research into anti-malarial drugs.
  • Cyclomethycaine
    Surfacaine
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Cyclopentamine
    Cyclonarol, Cyklosan, Sinos
    Banned
    Click to expand
    Definition: Psychoactive
    Information:
    Used as a nasal decongestant, notably in Europe and Australia. . Now discontinued because it was superceded by safer and more effective drugs.
  • Cyclopentolate
    Ak-Pentolate, Ciclolux, Colircusi Cicloplejico, Cyclogyl, Cyclopentol, Cyclopentolate, Mydrilate, Skiacol, Zykolat
    Banned
    Click to expand
    Definition: Antimuscarinic
    Information:
    Used in paediatric eye examinations.
  • Cyclophenil (Cyclofenil)
    Fertodur, Menopax, Neoclym
    Banned
    Click to expand
    Definition: Anti-oestrogenic
    Information:
    It is used in the treatment of menstrual disorders, menopausal symptoms and abovulatory infertility. Cyclophenil acts as a modulator of estrogen receptors. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Cyclothiazide
    Anhydron, Renazide
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Used in the management of hypertension.
  • Cycrimine
    Cicrimina, Cycriminum, Pagitane
    Banned
    Click to expand
    Definition: Anticholinergic
    Information:
    Widely used in humans in the treatment and management of Parkinson's disease. Has the potential to affect performance.
  • Cyproheptadine
    Apenorm, Cyproheptadine, Cyprono, Cyprosian, Nuran, Periactinol, Periatin, Peritol, Supersan
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Cyproheptadine may be used in the control of allergies and in the treatment of headaches and Cushing's disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Danazol
    Azol, Cyclomen, Danatrol, Danocrine, Danokrin, Danol, Vabon, Winobanin
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    It has been used (off-licence) in humans in the management of menorrhagia, fibrocystic breast disease, immune thrombocytopenic purpura, breast pain (mastodynia) and hereditary angioedema.
  • Dantrolene
    Danlene, Dantamacrin, Dantralen, Dantrium, Dantrolen
    Conditionally Permitted
    Click to expand
    Definition: Muscle relaxant
    Information:
    Dantrolene may be used in the treatment of muscle stiffness or spasms. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Dapsone
    Acedapsone, Avlosulfon, Daps, Dubronax, Servidapsone, Sulfona
    Banned
    Click to expand
    Definition: Antileprotic
    Information:
    Used in combination with rifampicin and clofazimine in treatment of Mycobacterium leprae (Leprosy), but also used in the treatment of pemphigoid, lichen planus, pneumocisti carinii (or PCP pneumonia), and malaria.
  • Decamethonium
    Decacuran,Lopac-D-1260, Syncurine
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    Used during anaesthetic procedures as a neuromuscular blocking agent and/or skeletal muscle relaxant. Horses appear to be less sensitive to its action due to increased quantities of enzymes which metabolise this substance.
  • Dehydrochloromethyltestosterone
    Durabolin, Turinabol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Dehydrochlorotestosterone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Used as an anabolic substance with effects approximately equal to, or slightly greater than, those of testosterone, while exhibiting little or no androgenic activity.
  • Delmadinone acetate
    Delmate, Estrex, Tardak, Tardastren, Tardastrex, Vetadinon, and Zenadrex
    Banned
    Click to expand
    Definition: Hormone
    Information:
    Controls Testosterone levels producing chemical castration.
  • Delorazepam
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Dembrexine
    Dembrexina, Dembrexin, Sputolysin
    Conditionally Permitted
    Click to expand
    Definition: Mucolytic
    Information:
    Demxbrexine may be used in the treatment of respiratory disease. The detection time is estimated with 120 hours (5 days) after oral administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Demecolcine
    Colcemid, Omain, Omaine, Reichstein's F, Santavy's Substance F, Substance F
    Banned
    Click to expand
    Definition: Rheumatic treatment/anti-cancer
    Information:
    Demecolcine is a Specified Substance. It is medically used to improve the results of radiotherapy, as the metaphase is the radiosensitive phase of the cell cycle, and to control leukaemia and gout. Also used in animal cloning, as it induces the ejection of the cell nucleus, creating space for the insertion of a new one.
  • Demoxepam
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is a benzodiazepine derivative, and a metabolite of chlordiazepoxide, with anticonvulsant properties.
  • Deoxycorticosterone
    Cortexon, Corticosterone, Cortiron, Cortitron, Cortisteron, Descotone, Dorcostrin, Percorten V (acetate), Percorten pivalate, Syncortyl
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used in the treatment of Addison's disease, and other adrenocortical deficiency states.
  • Deptropine
    Brontin, Brontina, Brontine
    Banned
    Click to expand
    Definition: Antihistamine with anticholinergic activity
    Information:
    Used in the treatment of asthma and bronchitis. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Deracoxib
    Deramaxx
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Deracoxib may be used to relieve pain and inflammation With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Dermorphin
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Peptide opiod receptor agonist
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Deserpidine
    Aescin, Canescin, Canescine, Deresperine, Deserpine, Harmonyl, Raunorine, Raunormin, Raunormine, Recanescin, Recanescine, Reserpidine, Tranquinil
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used for the treatment of hypertension.
  • Desipramine
    Deprexan, Desipramine, Norpramine, Nortimil, Pertofran, Pertofrane, Sertofren
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    It is used to treat depression and neuropathic pain.
  • Desmethylpyrilamine
    Conditionally Permitted
    Click to expand

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Desonide
    Apolar, DesOwen, Sine Fluor, Tridesilon Ointment
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used in the treatment of various skin disorders.
  • Desoximethasone (Desoxymethasone)
    Actiderm, Flubason, Ibaril, Stiedex, Topicorete, Topicort, Topicorte, Topiderm
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used in the treatment of various skin disorders.
  • Desoxyephedrine
    Desoxyn
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used for the treatment of attention deficit/hyperactivity disorder.
  • Desoxymethasone (Desoximethasone)
    Actiderm, Flubason, Ibaril, Stiedex, Topicorete, Topicort, Topicorte, Topiderm
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used in the treatment of various skin disorders.
  • Desoxymethyltestosterone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A synthetic steroid, specifically produced for human performance enhancement.
  • Desoxyvinyl-testosterone
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An anabolic steroid analogue of of Madol (also known as desoyx-methyltestosterone) with no legitimate therapeutic indication in the equine athlete.
  • Detomidine
    Domosedan, Dormosedan
    Conditionally Permitted
    Click to expand
    Definition: Sedative
    Information:
    Detomidine may be used for sedation and anaesthetic premedication. The detection time is estimated with 48 hours (2 days) after intra-venous administration. Please remember: A detection time is not the same as a withdrawal time.The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Dexamethasone
    Azium, Decaspray, Dectancyl, Deronil, Dexaltin, Dexamethasone, Dexject SP, Hostadex, Millicortene, Taprodex, Tuttozem N, Visumetazone, Wymesone
    Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Dexamethasone is used to treat many inflammatory and auto-immune conditions. The detection time is estimated with 48 hours (2 days) after intra-venous administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Dextromethorphan
    Broncho-grippol-DM, Bal-Minil DM, Benylin DM, Robitussin
    Banned
    Click to expand
    Definition: Antitussive
    Information:
    It is used for the treatment of dry coughs.
  • Dextromoramide
    Jetrium, Narcolo, Palfium
    Banned
    Click to expand
    Definition: Narcotic
    Information:
    It is used in the treatment of severe pain.
  • Dextropropoxyphene
    Abalgin, Algafan, Darvon, Depronal, Develin, Doloxene, Liberen, Novo-Propoxyn,
    Banned
    Click to expand
    Definition: Opiate analgesic
    Information:
    It is used in combination with other analgesics with anti-inflammatory and antipyretic effects, such as Aspirin and Paracetamol.
  • Dextrorphan
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Antitussive
    Information:
    It acts as a cough suppressant and dissociative hallucinogen.
  • Dezocine
    Dalgan
    Banned
    Click to expand
    Definition: Opiate analgesic
    Information:
    It is used for the relief of severe pain.
  • Diacerein
    Artrodar, Artrolyt, Fisiodar, Verboril
    Banned
    Click to expand
    Definition: Antiarthritic
    Information:
    It is used in the treatment of of osteoarthritis.
  • Diamorphine (Heroin)
    Diamorf, Diamorphine, Diaphin
    Banned
    Click to expand
    Definition: Narcotic
    Information:
    It is used in the treatment of severe pain, myocardial infarction, acute pulmonary oedema, and chronic pain.
  • Diaveridine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Folic acid antagonist
    Information:
    It is used for the control of coccidiosis in poultry.
  • Diazepam
    Complutine, Dialar, Diaquel, Diazemuls, Diazepam, Dienpax, Dizac, Ducene, Duradiazepam, Hexalid, Lamar, Relanium, Saromet, Stesolid, Valium
    Conditionally Permitted
    Click to expand
    Definition: Sedative
    Information:
    Diazepam may be used to reduce anxiety, as sedation and in anaesthetic premedication. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Diazoxide
    Diazoxide, Eudemine, Hyperstat, Proglicem, Proglycem
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    It is used in the treatment of acute hypertension and diabetes.
  • Dibenzepin
    Ecatril, Neodalit, Noveryl, Victoril
    Banned
    Click to expand
    Definition: Psychoactive
    Information:
    It is used in the treatment of depression.
  • Dibucaine
    Cincain, Cinchocaine, Nupercainal, Somulose
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    It can be found in some topical hemorrhoid creams. As a component of Somulose, it is used for euthanasia of horses and cattle.
  • Dichlorisone
    Dermaren, Dicloderm, Diclasone
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used for the treatment of various skin disorders.
  • Dichloroacetate
    Ditrei, Oxypangam, Sklerocedin N, Lactanase Injection
    Conditionally Permitted
    Click to expand
    Definition: Organic acid
    Information:
    Dichloroacetate may be used to reduce blood lactate. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Dichlorphenamide
    Antidrasi, Daranide, Dasanide, Fenamide, Glaucol, Glauconide, Glaumid, Oralcon, Oratrol, Tensodilen
    Banned
    Click to expand
    Definition: Carbonic anhydrase inhibitor
    Information:
    It is used for the treatment of glaucoma.
  • Diclofenac
    Algenac, Dichronic, Diclofenac, Diclo-Phlogont, Dolofenac, Doltarac, Neriodin, Reumadil, Surpass, Tsudohmin, Voltaren
    Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Diclofenac may be used to relieve pain and inflammation With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Dicumarol
    Acadyl, Acavyl, Anathrombase, Antitrombosin, Apekumarol, Baracoumin, Cuma, Cumid, Dicoumal, Dicuman, Dicumaol R, Dicumarol, Dicumol, Dufalone, Kumoran, Melitoxin, Temparin, Trombosan
    Banned
    Click to expand
    Definition: Anticoagulant
    Information:
    Uses are similar to those of Warfarin.
  • Diethylpropion
    Delgamer, Diethylpropion, Menutil, Prefamone, Regenon, Tenuate Dospan
    Banned
    Click to expand
    Definition: Anorexic
    Information:
    It is used in the treatment of exogenous obesity.
  • Diethylthiambutene
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Opiate analgesic
    Information:
    It is used as an anaesthetic in veterinary medicine.
  • Diethyltryptamine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Psychedelic
    Information:
    It is an hallucinogenic agent, similar to dimethyltryptamine.
  • Diflorasone acetate
    ApexiCon, Florone E, Flutone, Psorcon E, Vincosona
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used in the treatment of various skin disorders.
  • Diflucortolone
    Claral, Dermaval, Neriforte, Nerisona, Nerisone, Temetex
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used for the treatment of various skin disorders.
  • Diflunisal
    Adomal, Artrodol, Diflonid, Difludol, Diflunil, Dolisal, Dolobid, Dolobis, Donobid, Dorbid, Fluniget, Fluodonil, Flustar, Ilacen, Noaldol, Reuflos, Unisal
    Banned
    Click to expand
    Definition: Analgesic
    Information:
    It is used as an analgesic for the relief of pain and inflammation in osteoarthritis and rheumatoid athritis.
  • Digitoxin
    Asthenthilo, Coramedan, Crystodigin, Digicor, Digilong, Digimed, Digimerck, Digipural, Digitaline, Digitasid, Digitrin, Ditaven, Mono-Glycocard, Tardigal
    Banned
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    It is used for the treatment of poor or erratic kidney function, and heart failure.
  • Digoxin
    Cardigox, Cardiogoxin, Cardioreg, Coragoxine, Digacin, Digivern, Digomal, Digitek, Eudigox, Lanacordin, Lanachrist, Lanicor, Lanorale, Lanoxin, Lanoxicaps, Lanoxcine, Natigoxin, Novodigal, Prodigox
    Conditionally Permitted
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    Digoxin may be used in the treatment of heart failure and cardiac rhythm abnormalities. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Dihydrocodeine
    DHC Continus, Paracodine, Remedacen, Rikodeine, Tiamon
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It is used for the relief of moderate to severe pain.
  • Dihydrocodeinone
    Hydrococet, Symtan, Anexsia, Dicodid, Hycodan, Hydromet, Hycomine, Hycet, Lorcet, Lortab, Norco, Novahistex, Hydrovo, Duodin, Kolikodol, Orthoxycol, Mercodinone, Synkonin, Norgan, Hydrokon, Vicodin
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It is used to relieve moderate to moderately severe pain.
  • Dihydroergotamine
    Adhaegon, Dergiflux, Dergolyoc, Dergotamine, Detemes, DHE, Dihydergot, Dihydroergotamine, Diidergot, Ergovasan, Orstanorm, Tonopres
    Banned
    Click to expand
    Definition: Ergot alkaloid
    Information:
    It is used for the treatment of acute attacks of migraine and acute cluster headache episodes.
  • Dihydromorphine
    Paramorphan
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It is used for the relief of severe and moderate pain.
  • Diisopropylamine
    B-15, Cubisol, Dedyl, Diedi, Kalodil, Neovascoril, Nutricor, Oxypangam, Vasculene, Pangamic acid,Top B15+3,DADA 250, Tridenosen, Heptenal
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    It is used in the treatment of peripheral and cerebral vascular disorders.
  • Diltiazem
    Acalix, Altiazem, Angizem, Britiazim, Calcicard, Cardizem, Diladel, Diltiazem, Hart, Herbesser, Incoril, Masdil, Presoquin, Tilazem, Tildiem, Zilden
    Conditionally Permitted
    Click to expand
    Definition: Anti-arrythmic
    Information:
    Diltiazem may be used in the treatment of heart rhythm abnormalities. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Dimefline
    Reanimil, Remeflin
    Banned
    Click to expand
    Definition: Respiratory stimulant
    Information:
    It is used as a respiratory stimulant and acts like Doxapram.
  • Dimethindene
    Fengel, Fenistil, Fenostil, Trimedil N
    Banned
    Click to expand
    Definition: Antipruritic
    Information:
    It is used in the treatment of allergic conditions.
  • Dimethisoquin
    Haneal, Isochinol, Pruralgan, Pruralgin, Quotane
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    It is used for the relief of pain and pruritos associated with haemorrhoids, sunburn and insect stings.
  • Dimethyl Sulphoxide (DMSO)
    Decap, Deltan, Demasorb, Demavet, Demeso, Demsodrox, Dermasorb, Dimexide, Dolicur, Doligur, Domoso, Dromisol, Durasorb, Gamasol 90, Hyadur, Infiltrina, Kemsol, Rimso 50, Sclerosol, Somipront, Syntexan, Topsyn
    Conditionally Permitted
    Click to expand
    Definition: Solvent
    Information:
    Dimethyl Sulphoxide (DMSO) may be used in the treatment of inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Dimethylamphetamine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Dimethyltryptamine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Psychedelic
    Information:
    Its role in therapy is doubtful, and it was used for some time as an adjunct to psychotherapy. Its use has been abandoned. Dimethyltryptamine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance.
  • Diphenadione
    Contrax-D, Didandin, Didion, Dipaxin, Diphac, Diphacin, Diphacins, Gold Crest, Kill-Ko Rat Killer, Oragulant, Parakakes, Promar, Promar PCQ, Ramik, Ratindan,Ratindan 1, Rodent Cake, Solvan
    Banned
    Click to expand
    Definition: Anticoagulant
    Information:
    Its actions are similar to those of Warfarin. Like Phenindione, its use has declined in favour of Coumarins.
  • Diphenhydramine
    Benadryl Original, Benetussin, Broncleer, Cotussin, Dastusin, Delixir, Histodor Expectorant, Lupihist, Med-Tussin, Relief-Coff
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Diphenhydramine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Diphenoxylate
    Diarsed, Diphenoxylate, Lofenoxal, Lomotil, Lonox
    Banned
    Click to expand
    Definition: Opiod agonist
    Information:
    It is used in the treatment of acute and chronic diarrhoea.
  • Diphenylpyraline
    Arbid N, Hispril, Histalert, Histryl, Lergoban, Lyssipoll
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    It is used for the treatment of allergic rhinitis and allergic skin disorders. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Dipipanone
    Diconal, Fenpidon, Pipadone, Wellconal
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It is used to treat moderate or severe pain.
  • Diprenorphine
    M5050, Revivon
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It is used to tranquilise large animals.
  • Diprophylline
    Alergical Expect, Philinal, Ozothine
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    It is used for the relief of acute bronchal asthma and reversible bronchospasms, associated with chronic bronchitis and emphysema.
  • Dipyridamole
    Anginal, Cleridium, Coribon, Coronarine, Corosan, Coroxin, Dipyridamole, Dipyridan, Maxicardil, Miosen, Natyl, Novodil, Peridamol, Persantin, Procardin, Trompersantin
    Banned
    Click to expand
    Definition: Antiplatelet
    Information:
    It is used for stroke prophylaxis (antithrombotic activity). It has also been used as a vasodilator in the long-term management of chronic angina pectoris.
  • Dipyrone (Metamizole)
    Adolkin, Alginodia, Dolemicin, Lasain, Metilon, Metamizole, Minalgin, Neo-Melubrine, Nolotil, Novalgin, Novaminsulfon, Novemina, Optalgin, Vetalgin, Zimeta
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Dipyrone (metamizole) may be used to relieve pain and spasms. The detection time is estimated with 72 hours (3 days) after intravenous administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Disopyramide
    Dicorynan, Dirythmin, Diso-Duriles, Durbis, Norpace, Rythmodan, Rythmodul
    Banned
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    It is used for the treatment of ventricular arrhythmias.
  • Disulfiram
    Abstensil, Abstinyl, Antabus, Antietil, Antivitium, Averzan, Esperal, Etiltox, Refusal
    Banned
    Click to expand
    Definition: Aldehyde dehydrohenase inhibitor
    Information:
    It is used in the treatment of chronic alcoholism.
  • Dixyrazine
    Esucos
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used in the treatment of psychiatric disorders.
  • DMAA
    Iron Tiger, Forthane, Geranamine, Floradrene
    Banned
    Click to expand
    Definition: Sympathomimetic
    Information:
    DMAA is a stimulant that can affect performance and has no legitimate use in sports horses
  • DMSO (Dimethyl Sulphoxide)
    Decap, Deltan, Demasorb, Demavet, Demeso, Demsodrox, Dermasorb, Dimexide, Dolicur, Doligur, Domoso, Dromisol, Durasorb, Gamasol 90, Hyadur, Infiltrina, Kemsol, Rimso 50, Sclerosol, Somipront, Syntexan, Topsyn
    Conditionally Permitted
    Click to expand
    Definition: Solvent
    Information:
    DMSO (Dimethyl Sulphoxide) may be used in the treatment of inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Dobutamine
    Dobucard, Dobuject, Dobutamine, Dobutrex, Posiject
    Conditionally Permitted
    Click to expand
    Definition: Sympathomimetic
    Information:
    Dobutamine is used in the treatment of hypotension. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Donepezil
    Alzaimax, Aricept, Aricept ODT, Donepezil, Eranz, Memorit
    Banned
    Click to expand
    Definition: Cholinesterase inhibitor
    Information:
    It is used in the treatment of Alzheimer's disease.
  • Dopamine
    Cordodopa, Dopamine, Dynatra, Giludop, Hettytropin, Inotropin, Inovan, Intropin, Revimine, Revivan
    Conditionally Permitted
    Click to expand
    Definition: Stimulant
    Information:
    Dopamine may be used in the treatment of hypotension during anaesthesia. Dopamine is a Threshold Substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Dopexamine
    Dopacard
    Banned
    Click to expand
    Definition: Beta 2 adrenergic receptor agonist
    Information:
    It is used in the management of heart failure.
  • Dorzolamide
    Dorzolamide, Dorzox, Glaucotensil, Timsopt, Trusopt
    Conditionally Permitted
    Click to expand
    Definition: Carbonic anhydrase inhibitor
    Information:
    Dorzolamide may be used in the treatment of opthalmic disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Dothiepin
    Dopress, Dothep, Prothiaden, Thaden
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    It is used in the treatment of low-level anxiety, depression and similar disorders.
  • Doxacurium
    Nuromax
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    It is used to facilitate endotrachial intubation and skeletal muscle relaxation during surgery, mechanical ventilation and general anaesthesia.
  • Doxapram
    Docatone, Dopram, Doxapram, Doxapril, Stimulexin
    Conditionally Permitted
    Click to expand
    Definition: Stimulant
    Information:
    Doxapram may be used to stimulate the central nervous system. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Doxepin
    Adapin, Aponal, Doxepin, Quitaxon, Sinequan, Sinquan, Sinquane, Triadapin
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    It is used in the treatment of depression.
  • Doxylamine
    Alsadorm, Decapryn, Gittalun, Hoggar N, Mereprine, Sanalepsi N, Sedaplus, Somnil, Unisom-2
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Doxylamine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Drofenine
    Cibalen, Espasmo Cibalena, Lunadon, Sonotryl, Spasmoplus, Spasmo-Cibalgin, Trasentine A
    Banned
    Click to expand
    Definition: Antispasmodic
    Information:
    It is used in the treatment of antispasmodic and anticholinergic disorders such as gastric and cardio-respiratory diseases.
  • Dromostanolone
    Drolban, Masterid, Masteril, Masteron, Permastril
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    It is used in the treatment of cancer.
  • Droperidol
    Dehidrobenzperidol, Dridol, Droleptan, Inapsine, Sintosian
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used as a tranquiliser, and to reduce the incidence of nausea and vomiting in surgical and diagnostic procedures.
  • Drospirenone
    Jasminelle, Yasmin, Yaz, Yira, Yirala
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    It is used for the prevention of pregnancy in women.
  • Drostanolone
    Masterid, Masteril, Masteron, Masterone, Permastril
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    It is used in the treatment of cancer in women.
  • Drotaverine
    No-Spa, Drotin DS, Doverin, Trospa
    Conditionally Permitted
    Click to expand
    Definition: Anti-spasmodic
    Information:
    Drotaverine may be used to relieve pain and spasms. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Duloxetine
    Cymbalta, Duxetin, Xeristar, Yentreve
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    It is used for the treatment of Major Depressive Disorders (MDD).
  • Dyclonine
    Dyclone, Dyclothane, Tanaclone
    Banned
    Click to expand
    Definition: Oral anaesthetic
    Information:
    It is used for topical anaesthesia of the skin and mucous membranes.
  • Dyphylline
    Dilor, Glyfyllin, Neothylline, Neutrafillina, Neutraphyllin, Propyphyllin, Silbephyllin, Teofen
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    It is used to relieve acute bronchial asthma and reversible bronchospasms associated with chronic bronchitis and emphysema.
  • Ecgonine Methyl Ester
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Cocaine metabolite
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Edrophonium
    Anticude, Enlon, Reversol, Tensilon
    Banned
    Click to expand
    Definition: Angiotensin-converting enzyme inhibitor
    Information:
    It is used for differential diagnosis of myasthenia gravis, and for evaluating emergency treatment in a myastenic crisis. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Efaproxiral
    Efaproxyn
    Banned
    Click to expand
    Definition: Haemoglobin modifier
    Information:
    It is used in the treatment of certain types of cancer to increase oxygen levels in hypoxic blood.
  • Eletriptan
    Relert, Relpax
    Banned
    Click to expand
    Definition: Migraine relief
    Information:
    It is used in the treatment of migraine.
  • Eltenac
    Telzenac
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Eltenac may be used to relieve pain and control fever. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Embramine
    Bromadryl, Mebryl, Medrin
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    It is an ethanolamine derivative with the properties and uses of antihistamine. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Embutramide
    T-61 Euthanasia Solution
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It is used for the euthanasia of different animals.
  • Emepronium
    Cetiprin, Cetiprin Novum, Detrulisin, Hexanium, Uro-Ripirin
    Banned
    Click to expand
    Definition: Antispasmodic
    Information:
    It is used to reduce the muscular tone of urinary bladder in postoperative vesical tenesmus, and in urinary frequency.
  • Emidonol
    Banned
    Click to expand
    Definition: Anti-ischaemic
    Information:
    The substance contains meldonium which is used to treat ischaemia and has anticonvulsant effects. It can also enhance performance and improve recovery time after exercise.
  • Enalapril (Enalaprilat)
    Bonuten, Enalapril Richet, Gadopril, Kinfil, Vasotek I.V.
    Banned
    Click to expand
    Definition: Angiotensin-converting enzyme inhibitor
    Information:
    It is used in the treatment of various types of heart failure and hypertension. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Enalaprilat (Enalapril)
    Bonuten, Enalapril Richet, Gadopril, Kinfil, Vasotek I.V.
    Banned
    Click to expand
    Definition: Angiotensin-converting enzyme inhibitor
    Information:
    It is used in the treatment of various types of heart failure and hypertension. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Enciprazine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Endorphins
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Endogenous opiods
    Information:
    It is used as an opioid analgesic.
  • Enkephalins
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Endogenous pain relief
    Information:
    It is used to relieve moderate pain.
  • Ephedrine
    Ectasule Minus, Efetonina, Ephedral, Ephetonin, Fedrine, Minims Ephedrine Hydrochloride, Rhino-Vaccin, Rino Pumilene, Roter, Spaneph, Stopasthme
    Banned
    Click to expand
    Definition: Stimulant (High level)
    Information:
    It has a stimulant effect on the respiratory center and central nervous system.
  • Epi-dihydrotestosterone
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A potent metabolite of testosterone with no legitimate therapeutic indication in the equine athlete.
  • Epibatidine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Analgesic
    Information:
    It was used for the treatment of neuropathic pain in humans, but dropped from further development because of serious side effects.
  • Epiternbolone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Epitestosterone
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An epimer of testosterone with no legitimate therapeutic indication in the equine athlete.
  • Eplerenone
    Inspra
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    A diuretic used in the treatment of hypertension and heart failure. It has no therapeutic indication in the equine athlete.
  • Ergonovine
    Basergin, Ergonovine, Ergotrate, Metrergina, Mitrotan
    Banned
    Click to expand
    Definition: Vasoconstrictor
    Information:
    It is used to prevent bleeding after childbirth. Ergonivine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance.
  • Ergotamine
    Ergomar, Ergostat, Medihaler-Ergotamine, Wigrettes
    Banned
    Click to expand
    Definition: Plant alkaloid
    Information:
    It is used in the management of vascular headache, by either preventing or aborting onset of this condition. Ergotamine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance.
  • Ertugliflozin
    Steglatro
    Conditionally Permitted
    Click to expand
    Definition: Anti-hyperglycaemic
    Information:
    Ertugliflozin may be used in the treatment of equine metabolic syndrome. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Erythrityl tetranitrate
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Blood vessel relaxant
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Erythropoietin (EPO)
    Aranesp, Dynepo, Epocrin, Epogen, Erypo, Exetin-A, Pronivel
    Banned
    Click to expand
    Definition: Erythropoiesis
    Information:
    It is used in the treatment of anaemia, cancer, and other critical illnesses, such as heart failure.
  • Esmolol
    Brevibloc, Esmolol, Miniblock
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    It is used in the treatment of cardiac arrhythmias. It has similiar properties to those of Propanolol.
  • Estazolam
    Domnamid, Esilgan, Estazolam, Eurodin, Nuctalon
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used in the treatment of certain sleep disorders.
  • Estranediol
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Estrone
    Cristallovar, Femogen, Kolpon, Oestrilin
    Conditionally Permitted
    Click to expand
    Definition: Hormone
    Information:
    Estrone is an ostrogen hormone that may also be used in the control of exercise induced pulmonary haemorrhage. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Etafedrine
    Nethaprin
    Banned
    Click to expand
    Definition: Adrenergic
    Information:
    It is used in the management of bronchospasms.
  • Etamiphylline
    Boifilina, Corafil, Dechophyline, Iodafilina, Longtussin, Solufilina, Ultratussin
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    It is used in the treatment of cardiac and respiratory distress in neonatal foals.
  • Etamivan
    Clairvan, Corivanil, Romecor, Vandid
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used in the treatment of chronic obstructive pulmonary disease, and barbiturate overdose.
  • Etanercept
    Enbrel
    Banned
    Click to expand
    Definition: Tumor necrosis factor inhibition
    Information:
    It is used for the treatment of various types of arthritis, and moderate to severe plaque psoriasis.
  • Ethacrynic acid
    Crinuryl, Edecril, Edecrin, Edecrina, Hidromedin, Mingit, Otacril, Reomax, Taladren, Uregit
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    It is used for the treatment of oedema and high blood pressure.
  • Ethamivan
    Clairvan, Corivanil, Romecor, Vandid
    Banned
    Click to expand
    Definition: Respiratory stimulant
    Information:
    It is used in the treatment of chronic obstructive pulmonary disease, and barbiturate overdose.
  • Ethamsylate
    Aglumin, Altodor, Antihaemorragico Fortuny, Dicinone, Dicynene, Dicynone, Eselin,Haemo 141, Impedil
    Banned
    Click to expand
    Definition: Haemostatic
    Information:
    It is used in the treatment of haemorrhages from small blood vessels, and for its prophylactic properties.
  • Ethanol
    Conditionally Permitted
    Click to expand
    Definition: Organic compound
    Information:
    Ethanol may be used in the treatment of orthopaedic disease and as a sedative. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Ethaverine
    Cebral, Ethaquin, Ethatab, Ethavex, Isovex, Laverin, Pasmol
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    It is used as an anti-arrhythmic.
  • Ethchlorvynol
    Alvinol, Placidil, Placidyl, Serenesil, Serenesil
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It is used for the treatment of insomnia.
  • Ethiazide
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    It has similar properties to those of Chlorothiazide.
  • Ethinamate
    Valamin, Valamina, Valaminetta, Valaminettae, Valaminetten, Valmid, Valmidate
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It is used for the treatment of insomnia.
  • Ethinylestradiol
    Estigyn, Estinyl, Ethinyloestradiol, Feminone, Femodette, Microgynon ED, Primogyn
    Banned
    Click to expand
    Definition: Oestrogen
    Information:
    It is used as a contraceptive. In is also uses in the treatment of primary amenorrhoea, and for the palliative treatment of malignant neoplasms of the prostate, and of the breast in postmenopausal women.
  • Ethoheptazine
    Panalgin, Zactane
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It is used in the treatment of mild to moderate pain.
  • Ethopropazine
    Lysivane, Parkin, Parsotil, Tomil
    Banned
    Click to expand
    Definition: Antimuscarinic
    Information:
    It is used in the treatment of Parkinson's disease.
  • Ethosuximide
    Emeside, Ethosuximide, Ethymal, Petinimid, Petnidan, Pyknolepsinum, Simatin, Suxinutin, Thetamid, Zarodan, Zarontin
    Banned
    Click to expand
    Definition: Anti-epileptic
    Information:
    It is used in the treatment of abesence seizures.
  • Ethotoin
    Accenon, Peganone, Pegoanone
    Banned
    Click to expand
    Definition: Anticonvulsant
    Information:
    It is used for the treatment of epilepsy.
  • Ethoxzolamide
    Cardrase, Diuretic C, Ethamide, Redupresin
    Banned
    Click to expand
    Definition: Carbonic anhydrase inhibitor
    Information:
    It is used as a diuretic, and to treat glaucoma and duodenal ulcers.
  • Ethyl Aminobenzoate (Benzocaine)
    Americaine, Anaesthesin, Anbesol, Baby Anbesol, Bensokain, Capacol, Gengivarium, Hurricaine, Spec-T, Teething Syrup, Topicaine
    Conditionally Permitted
    Click to expand
    Definition: Local anaesthetic
    Information:
    Ethyl aminobenzoate is used for the temporary local relief of pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Ethyl Loflazepate
    Victan
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is a benzodiazepine, and so has anxiolytic, anticonvulsant, sedative and muscle-relaxant properties. Not approved for use in veterinary medicine. High possibility of affecting performance.
  • Ethylamphetamine
    Apetinil, Apetinil-Depo, Adiparthrol
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used as an appetite suppressant.
  • Ethylestrenol
    Orabolin, Nandoral
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    It is an anabolic with a mild androgenic effect.
  • Ethylisobutrazine
    Ethylisobutrazine Hydrochloride Tablets
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It is used as a neuroleptic tranquiliser.
  • Ethylmorphine
    Cocillana, Codethyline, Dionina
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It is used as an antitussive to treat dry coughs and ophthalmology for removing inflammation products from the eyes.
  • Ethylnorepinephrine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Etidocaine
    Duranest, Etidocaine Hydrochloride
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    It is used as an anaesthetic in surgical procedures.
  • Etifoxine
    Stresam
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used in the treatment of anxiety disorders, and to promote peripheral nerve healing.
  • Etilefrine
    Circupon, Effontil, Effortil, Eti-Puren, Tonus-Forte-Tablinen
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used in the treatment of hypotension.
  • Etiocholanolone
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A metabolite of testosterone with no legitimate therapeutic indication in the equine athlete.
  • Etizolam
    Depas, Pasaden, Sedekopan
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used in the treatment of insomnia and anxiety.
  • Etodolac
    Edolan, Etodolac, Lodine, Ultradol, Zedolac
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used for the treatment of rheumatoid arthritis, mild to moderate pain, fever, and inflammation.
  • Etodroxizine
    Indunox, Isonox
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used in the treatment of allergies.
  • Etomidate
    Amidate, Hypnomidate, Sibul
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It is used to induce anaesthesia.
  • Etoricoxib
    Algix, Arcoxia, Nucoxia, Tauxib
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used in the treatment of osteoarthritis, ankylosing spondylitis, rheumatoid arthritis, chronic lower back pain, acute pain and gout.
  • Etorphine
    Immobilon,M99
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It is used to immobilise large mammals.
  • Exemestane
    Aromasil, Aromasin, Aromasine, Exemestance, Exemestane, Nikidess
    Banned
    Click to expand
    Definition: Aromatase inhibitor
    Information:
    It is used in the treatment of breast cancer.
  • Famprofazone
    Gewodin
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It has analgesic and antipyretic properties.
  • Febaramate
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Felbamate
    Felbamyl, Felbatol, Taloxa
    Banned
    Click to expand
    Definition: Anticonvulsant
    Information:
    It is used in the treatment of epilepsy and partial seizures.
  • Felbinac
    Dolinac, Dolonac, Dolo Target, Flexfree, Ledergel, Napagel, Napageln, Selspot, Seltouch, Target, Traxam, Zenol Exum
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Felbinac may be used to relieve pain and inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Felodipine
    Agon, Feloday, Felodur, Felogard, Flodil, Hydac, Modip, Munobal, Penedil, Perfudal, Plandil, Plendil, Preslow, Prevex, Renedil, Splendil
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    It is used for the treatment of hypertension.
  • Fenbufen
    Bufemid, Cincopal, Cinopal, Lederfen
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used for the treatment of rheumatic disorders.
  • Fenbutrazate
    Filon
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used as an anorectic.
  • Fencamfamine
    Euvitol, Glucoenergan, Reactivan
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used for the treatment of depressive fatigue.
  • Fencamine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Fenclofenac
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used for the treatment of rheumatism with mild immunosuppressive effects.
  • Fenclozic acid
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It was withdrawn from study because of hepatotoxicity.
  • Fenethylline (Fenetylline, Phenethylline, Phenetylline)
    Biocapton, Captagon, Fitton
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used for the treatment of hyperactive children and narcolepsy.
  • Fenetylline (Fenethylline, Phenethylline, Phenetylline)
    Biocapton, Captagon, Fitton
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used for the treatment of hyperactive children and narcolepsy.
  • Fenfluramine
    Acino, Adipomin, Dima-Fen, Obedrex, Ponderal, Ponderax, Pondimin, Ponflural, Rotondin
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used as an anorectic agent in the short-term treatment of moderate to severe obesity.
  • Fenoldopam
    Corlopam, Fenoldopam
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    It is used for the treatment of hypertension.
  • Fenoprofen
    Expron, Fenoprofen, Fepron, Nalfon, Nalgesic, Progesic
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used for the treatment of rheumatoid arthritis, osteoarthritis, and moderate pain.
  • Fenoterol
    Berotec, Fenotrol, Fensol, Partusisten
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Fenoterol may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Fenozolone
    Ordinator
    Banned
    Click to expand
    Definition: Psychoactive
    Information:
    It is used for the treatment of symptoms of intellectual impairment and memory disorders.
  • Fenpiprane
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Gastrointestinal disorders
    Information:
    It is used for the treatment of gastrointestinal disorders.
  • Fenproporex
    Antiobes Retard, Appetitzügler, Dicel, Falagan, Gacilin, Grasmin, Lineal, Perphoxene, Solvolip, Tegisec
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used for the treatment of obesity.
  • Fenspiride
    Decaspir, Espiran, Eurespal, Fenspin, Fenspir, Fluiden, Pneumorel, Respiride, Viarespan
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used for the treatment of various respiratory diseases.
  • Fentanyl
    Actiq, Duragesic, Fentanest, Fentatil, Fentanyl, Pentanyl, Sentonil, Sublimaze
    Banned
    Click to expand
    Definition: Opioid
    Information:
    Fentanyl may be used to relieve pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Fentiazac
    Domureuma, Donorest, Fentac, Flogene, Norvedan, Riscalon
    Banned
    Click to expand
    Definition: Pain relief
    Information:
    It is used for the treatment of rheumatic and inflammatory disorders.
  • Feprazone
    Analud, Brotazona, Cocresol, Danfenona, Grisona, Impriemial, Methrazone, Naloven, Nessazona, Nilatin, Prenakes, Prenazon, Rangozona, Represil, Tabrien, Zepelin
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used for the treatment of rheumatic disorders.
  • Fexofenadine
    Allegra, Fexofenadine, Fexotabs, Kalicet, Telfast BD
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Fexofenadine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Firocoxib
    Equioxx, Previcox
    Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Firocoxib may be used to relieve pain and inflammation. The detection time is estimated with 336 hours (14 days) after oral administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Flavoxate
    Genurin, Spasuret, Urispadol, Urispas
    Banned
    Click to expand
    Definition: Antispasmodic
    Information:
    It is used for the treatment and symptomatic relief of some lower urinary tract disorders.
  • Flecainide
    Almarytm, Flecaine, Flecainide, Tambocor
    Banned
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    It is used for the treatment of a variety of cardiac arrhythmias.
  • Floctafenine
    Apo-Floctafenine, Diralgan, Idalon, Idarac, Novodolan
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used for the treatment of mild to moderate pain.
  • Fluandrenolide (Fluandrenolone, Fludroxycortide)
    Alondra-F, Cordran tape, Drenison, Haelan tape, Sermaka
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used for the treatment of skin disorders.
  • Fluandrenolone (Fluandrenolide, Fludroxycortide)
    Alondra-F, Cordran tape, Drenison, Haelan tape, Sermaka
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used for the treatment of skin disorders.
  • Fluanisone
    Anti-Pica, Metorin, Sedalande
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It is used as a tranquiliser for animals in combination with Fentanyl.
  • Fludiazepam
    Erispan
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used for the treatment of anxiety disorders.
  • Fludrocortisone (Fluorocortisone)
    Alflorone, Astonin, F-Col, F-Cortef, Florinef, Fludrone, Fluohydrisone, Fludrocortisone
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used for the treatment of cerebral salt wasting, adrenal insufficiency, and orthostatic intolerance.
  • Fludroxycortide (Fluandrenolide, Fluandrenolone)
    Alondra-F, Cordran tape, Drenison, Haelan tape, Sermaka
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used for the treatment of skin disorders.
  • Flufenamic acid
    Ansatin, Arlef, Meralen, Parlef, Sastridex, Surika
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used for the treatment of rheumatic disorders.
  • Flumetasone (Flumethasone)
    Locacorten, Locorten, Locortene
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Flumetasone is used for the treatment of various skin disorders. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Flumethasone (Flumetasone)
    Locacorten, Locorten, Locortene
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Flumethasone is used for the treatment of various skin disorders. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Flumethazide
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Flunarizine
    Flerudin, Flunagen, Flurpax, Fluxarten, Gradient, Issium, Sibelium, Vasculene
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    It is used as an inhibitor of peripheral and central vasoconstriction.
  • Flunisolide
    AeroBid, Bronalide, Bronilide, Gibiflu, Locasyn, Lokilan, Nasalide, Rhinalar, Syntaris
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used for the treatment of allergic rhinitis.
  • Flunitrazepam
    Darkene, Flunipam, Noriel, Primum, Rohypnol, Roipnol, Valsera
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used for the treatment of insomnia.
  • Flunixin Meglumine
    Banamine, Citation, Cronyxin, Finadyne, Flumevet LA, Flunazine, Flunixin, Influx-50, Meflosyl, Suppressor, Supressor
    Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Flunixin may be used to relieve pain, inflammation and control fever. The detection time is estimated with 144 hours (6 days) after intra-venous administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Fluocinolone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Fluocinolone acetonide
    Adermina, Boniderma, Capex, Cervicum, Cinotec, Cortalar, Cortilona, Dermalar, Dermofil, Elasven, Fluciderm, Flucort, Fluocinolone, Gelidina, Isnaderm, Localyn, Neoflu, Percutina, Sinalar, Synamol, Topifluor
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used for the treatment of various skin disorders.
  • Fluocinonide
    Bestasone, Cusigel,Flu-21, Fluocinonide, Klariderm, Lidemol, Lidex, Lyderm, Metosyn, Novoter, Topsym, Topsymin, Topsyne
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used for the treatment of various skin disorders.
  • Fluocortolone
    Syracort, Ultracur, Ultradil, Ultralan, Ultralanum, Ultralanum Plain
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used for the treatment of various skin disorders.
  • Fluopromazine (Triflupromazine)
    Psyquil, Siquil, Vesprin
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used for the management of psychosis, and the control of nausea and vomiting.
  • Fluoresone
    Caducid
    Banned
    Click to expand
    Definition: Anti-epileptic
    Information:
    It is used for the treatment of neuropsychiatric disorders.
  • Fluorocortisone (Fludrocortisone)
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Fluorometholone
    Cortilet, Cortisdin, Delmeson, Efflumidex, Fluaton, Flucon, Flumetholon, Flumetol semplice, FML, FML Liquifilm, Isopto-Flucon, Lerna, Oxylone, Ursnon
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used for the treatment of allergic and inflammatory conditions of the eye.
  • Fluorophenethylamine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Fluoroprednisolone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Fluoxetine
    Adofen, Animex-On, Deprex, Eufor, Fluctin, Fluoxetine, Fluval, Fontex, Foxetin, Portal, Prozac, Pulvules, Reneuron, Sarafem
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    It is used for the treatment of depression, bulimia nervosa, and obsessive-compulsive disorder.
  • Fluoxymesterone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Flupenthixol
    Depixol, Emergil, Fluanxol
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    It is used for the treatment of depression and schizophrenia.
  • Fluphenazine
    Anatensol, Dapotum D, Modecate, Moditen, Omca, Pacinol, Permitil, Prolixin, Sevinol, Siqualone
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used for the treatment of mental or mood disorders, as well as schizophrenia.
  • Flupirtine
    Flupirtine, Katadolon, Metanor, Trancopal Dolo
    Banned
    Click to expand
    Definition: Analgesic
    Information:
    It is used for the treatment of moderate pain.
  • Fluprednisolone (Flouroprednisolone)
    Alphadrol, Etadrol, Isopredon, Selectren, Vladicort
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is used for the treatment of various inflammatory rashes.
  • Flurazepam
    Dalmadorm, Dalmane, Flurazepam, Fordrim, Midorm AR, Novo-Flupam, Paxane, Somnol, Som-Pam, Staurodorm, Valdorm
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used for the treatment of insomnia.
  • Flurbiprofen
    Ansaid, Cebutid, Flugalin, Flurofen, Froben, Tulip
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used for the treatment of rheumatic disorders.
  • Fluspirilene
    Fluspi, Imap, Imap Forte, Kivat, Redeptin
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used for the treatment of schizophrenia.
  • Fluticasone
    Cutivate, Flixonase, Flixotide, Flonase, Flovent, Flovent Diskus, Fluticasone, Flutivate
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Fluticasone is used in the treatment of asthma, and as a topical anti-inflammatory agent. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Flutoprazepam
    Flutoprazepam Tablets
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used for the treatment of severe insomnia, anxiety, and stomach ulcers.
  • Fluvoxamine
    Faverin, Fevarin, Floxyfral, Fluvoxamina, Fluvoxamine, Luvox, Myroxine, Voxam
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    It is used for the treatment of depression and obsessive–compulsive disorder.
  • Formebolone
    Esiclene, Hubernol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Formestane
    Lentare, Lentaron
    Banned
    Click to expand
    Definition: Aromatase inhibitor
    Information:
    It is used for the treatment of breast cancer.
  • Formoterol
    Atock, Foradil, Oxeze Turbuhaler, Oxis Turbohaler
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Formoterol may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Fosinopril
    Fosinil, Fosinopril, Monopril, Secorvas, Staril, Vasopril
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    It is used for the treatment of hypertension and chronic heart failure.
  • Fosphenytoin
    Cerebyx, Cereneu, Fosphenytoin, Prodilantin, Pro-Epanutin
    Banned
    Click to expand
    Definition: Anticonvulsant
    Information:
    It is used for the treatment of severe seizures, and to prevent and treat seizures which may occur during brain or nervous system surgery.
  • Fulvestrant
    Faslodex
    Banned
    Click to expand
    Definition: Anti-oestrogenic
    Information:
    It is used in the treatment of metastatic breast cancer (specially postmenopause). Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Furazabol
    Miotolan, Miotolon
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    It is a derivative of the anabolic steroid, Stanozolol.
  • Furazadrol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A synthetic anabolic steroid with no legitimate therapeutic indication in the equine athlete.
  • Furfenorex
    Frugalan
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used for the treatment of obesity.
  • Furosemide
    Diural, Diurolasa, Frusid, Furosemide, Impugan, Lasix, Novosemide, Salix, Sigasalur, Urex
    Permitted
    Click to expand
    Definition: Diuretic
    Information:
    Furosemide may be used in the control of exercise-induced pulmonary haemorrhage, hypotension and oedema. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Gabapentin
    Aclonium, Gabapentin, Neurontin, Normatol, Novo-Gabapentin
    Conditionally Permitted
    Click to expand
    Definition: Anticonvulsant
    Information:
    Gabapentin may be used in the control of seizures and pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Galantamine
    Galantamine, Jilkon, Lycoremin, Nivalin, Reminyl
    Banned
    Click to expand
    Definition: Alzheimer medication - alkaloid
    Information:
    It is used for the treatment of moderate to mild Alzheimer's typedementia.
  • Gallamine
    Flaxedil
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    May be used to decrease severity of muscular spasms in tetanus, spastic paraplegia and other convulsive states. Not approved for use in veterinary medicine. Rarely used in equine medicine. High possibility of affecting performance.
  • Gamma amino butyric acid (GABA)
    Carolina Gold
    Banned
    Click to expand
    Definition: Inhibitory neurotransmitter
  • Gamma-Butyrolactone (GBL)
    Prodrug of Gamma-butyrolactone (GHB)
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Prodrug of Gamma-butyrolactone (GHB)
  • Gamma-Hydroxybutyrate (GHB)
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Also known as 4-hydroxybutanoic acid, is a naturally occurring substance found in the human central nervous system, as well as in wine, beef, small citrus fruits, and almost all animals in small amounts. It is also categorized as an illegal drug in many countries. It is currently regulated in Australia and New Zealand, Canada, most of Europe and in the US. GHB as the sodium salt, known as sodium oxybate (INN) or by the trade name Xyrem, is used to treat cataplexy and excessive daytime sleepiness in patients with narcolepsy. Gamma-Butyrolate (GBL) is a prodrug.
  • Gepirone
    Ariza, Variza
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    Anxiolytic and anti-depressant. Not approved for veterinary use. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Gestrinone
    Dimetriose, Dimetrose, Nemestran
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A synthetic steroid hormone that acts as an antiprogestin and also has some androgenic activity. It is marketed as a treatment for endometriosis. Gestrinone is available in many countries, but not in the USA. As it has anabolic effects,its use in competition has been banned by the International Olympic Committee. The derivative tetrahydrogestrinone (THG) was also banned by the Food and Drug Administration (FDA) in 2003. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Glutethimide
    Doriden
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Glutethimide is a Schedule II drug under the Convention on Psychotropic Substances in the USA. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Glycopyrrolate
    Asecryl, Glycopyrrolate, Nodapton, Robinul, Tarodyl, Tarodyn
    Conditionally Permitted
    Click to expand
    Definition: Anticholinergic
    Information:
    Glycopyrrolate may be used to reduce secretions before anaesthesia and in the treatment of asthma and abnormal heart rhythms. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Grapiprant
    Galliprant
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Grapiprant may be used to relieve pain and inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Growth Factors
    Chemicon
    Banned
    Click to expand
    Definition: Growth promotion
    Information:
    The product is for research-purposes only. A growth factor is a naturally occurring substance capable of stimulating cellular growth. There are many families, but insulin-like growth factor is the most predominant somatomedin, or growth factor hormone, and is thought to have anabolic effects. It is measured as an indicator of Growth Hormone abuse in racehorses.
  • Growth Hormone (GH) - or analogues
    EquiGen
    Banned
    Click to expand
    Definition: Growth Promotion
    Information:
    Equine growth hormone (eGH) is available as an approved drug containing recombinant eGH (reGH). It is registered for improvement of nitrogen balance in horses aged over 15 years. It is suspected of being illegally administered to racehorses to improve physical performance and speed up wound healing.
  • Guaifenesin
    Actifed CC Chesty, Balminil Expectorant, Benylin, Bronchol, Calcough Chesty, Duratuss G, Formulaexpec, Glyate, Larylin Lozenges, Myocaine, PV Tussin, Resyl, Robitussin, Sudafed Cough, Tedral Expectorant, Vicks Acta Plus Expectorant, Wick Formel 44 Husten-Loser
    Conditionally Permitted
    Click to expand
    Definition: Expectorant
    Information:
    Guaifenisin may be used in the treatment of respiratory disease and as a muscle relaxant during anaesthesia. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Guanabenz
    Wytensin
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Used to treat high blood pressure in humans. Guanabenz has reportedly been administered to race horses,and is classified by the International Association of Racing Commissioners as a class 3 foreign substance. The rationale for this administration is to reduce pulmonary blood pressure,thereby reducing the incidence and severity of exercise induced pulmonary hemorrhage (EIPH). As an a2 agonist agent, Guanabenz may have the ability to tranquilise or sedate a horse, relieve pain, and may also have some bronchodilator effect.
  • Guanadrel
    Hylorel
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    Guanadrel is a human antihypertensive drug that blocks the release of norepinephrine, normally produced by nerve stimulation. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Guanethidine
    Dopom, Ismelin, Ismeline, Visutensil
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    An antihypertensive medicine that also has an effect on chronic pain. Guanethidine reduces the release of catecholamines, such as noradrenaline, from the cells. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Guanoclor
    Vatensol
    Banned
    Click to expand
    Definition: Sympatholytic
    Information:
    As an antihypertensive also used to treat chronic pain. It has not been approved for use in veterinary medicine, for example by the US Food and Drug Administration, or any EU countriy. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Guanoxan
    Envacar
    Banned
    Click to expand
    Definition: Sympatholytic
    Information:
    Antihypertensive also used to treat chronic pain. It has not been approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • GW1516
    Endurobol, Cardarine
    Banned
    Click to expand
    Definition: Metabolic Modulator
    Information:
    GW1516 increases the horse's exercise capacity. It increases metabolism in skeletal muscles to burn fat and increase muscle mass. The substance was initially developed to treat metabolic and cardiovascular disease but later found to be carcinogenic.
  • Haemaglobin analogues
    Hemopure, Oxyglobin
    Banned
    Click to expand
    Definition: Oxygen transport
    Information:
    Oxyglobin is approved for the treatment of anemia in dogs in both Europe, and the USA. Not registered for use in horses. Human product Hemopure has not been able to gain approval in the UK or the USA because of safety and reliability concerns at the European Commission and the Food and Drud Administration (FDA), respectively.
  • Halcinonide
    Halog
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    A synthetic corticosteroid for human use. It is indicated for topical application to relieve inflammatory manifestations of acute or chronic corticosteroid responsive dermatoses (skin conditions).
  • Halobetasol
    Ultravate
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    Halobetasol cream and ointment are high potency topical corticosteroids indicated for the relief of skin inflammation in humans. Not registered for use in horses.
  • Halodrol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A synthetic anabolic-androgenic steroid with no legitimate therapeutic indication in the equine athlete.
  • Haloperidol
    Aloperidin, Bioperidolo, Brotopon, Dozic, Duraperidol, Einalon S, Eukystol, Haldol, Halosten, Keselan, Linton, Peluces, Serenace, Serenase, Sigaperidol
    Banned
    Click to expand
    Definition: Neuroleptic
    Information:
    Haloperidol is a human medicine with antipsychotic properties considered particularly effective in the management of hyperactivity, agitation and mania. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Harmaline
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Psychoactive
    Information:
    Central nervous system stimulant extracted from plants. No medicinal use. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Harpagoside (Devils claw)
    Devil's Claw, NoBute, Devil's Relief, Nil-Bute
    Banned
    Click to expand
    Definition: Analgesic
    Information:
    Harpagoside is the active substance in Devil's Claw and may be used to relieve pain and inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Heptaminol
    Coreptil, Eoden, Heptaminol, Hept-A-Myl, Heptylon, Myolytril
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Heptaminol dilates blood vessels, and is therefore suggested for treating low blood pressure in humans. Not approved for use in veterinary medicine.
  • Heroin (Diamorphine)
    Diamorf, Diamorphine, Diaphin
    Banned
    Click to expand
    Definition: Narcotic
    Information:
    It is used in the treatment of severe pain, myocardial infarction, acute pulmonary oedema, and chronic pain.
  • Hexafluorenium
    Mylaxen, Milaxen
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    Neuromuscular blocking agent used in anaesthesiology in humans. Not commercially available in USA or EU. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Hexobarbital
    Barbidorm, Citopan, Cyclonal, Cyclopan, Enhexymal, Enhexymalum, Evipal, Hexanastab, Hexenal, Methexenyl, Narcosan, Narcosan Soluble, Noctivane, Novopan, Privenal, Sombucaps, Sombulex, Somnalert
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Hexobarbital is a barbiturate with hypnotic and sedative effects. It was used previously for inducing anaesthesia for surgery. It is effective relatively quickly, and active for a short duration. It has been replaced with safer drugs and is only used for research purposes nowadays. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Hexocyclium
    Tral, Traline
    Banned
    Click to expand
    Definition: Antimuscarinic
    Information:
    Suggested use for treating peptic ulcers in humans, in conjunction with other treatments. May also have potential for use in the treatment of equine peptic ulcers but this has not been reported or studied yet.
  • Hexylcaine
    Cyclaine
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    Topical short term local anaesthetic.
  • Histapyrrodine
    Domistan
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    An antihistamine with possible sedative effect. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Homatropine
    Isopto Homatropine, Hycodan, Tussigon
    Banned
    Click to expand
    Definition: Anticholinergic
    Information:
    An anticholinergic drug used in its bromide form to dilate the pupil of the eye, and in combination with hydrocodone to prevent overdosage of that drug. Also called mandelytropine it is used in combination with cough medicines because homatropine helps to dry up nasal and breathing passages. It also relieves gastrointestinal spasms.
  • Homophenazine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Psychiatric drug
    Information:
    Not commercially available for medicinal use. For research purposes only. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Hordenine
    Victan
    Conditionally Permitted
    Click to expand
    Definition: Stimulant
    Information:
    Hordenine can be found in a number of grassy plants, grains and some species of cactus. The substance may stiumulate the central nervous system.. Hordenine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Huperzine A
    HupA, Selagine
    Banned
    Click to expand
    Definition: Acetylcholinesterase inhibitor
    Information:
    Huperzine A is used to increase alertness and treat myasthenia gravis. It has no legitimate use in the treatment of sports horses.
  • Hydralazine
    Apresolin, Furlazin, Nepresol, Pressalin
    Banned
    Click to expand
    Definition: Vasodilator; afterload reducer
    Information:
    Hydralazine hydrochloride is a smooth muscle relaxant that causes a drop in blood pressure by relaxing the musculature in the arteries. The sale of this drug has been discontinued in some countries. May have an indication in treating equine cardiac failure, but this has not been critically investigated. Not approved for use in equine medicine. No legitimate therapeutic indication in the equine athlete.
  • Hydrochlorothiazide (Hydrochlorthiazide)
    Adelphan, Dichlotride, Diurex, Esidrex, Hydrochlorothiazide, Hydro-Diuril, HydroSaluric, Novo-Hydrazide, Thiuretic
    Conditionally Permitted
    Click to expand
    Definition: Diuretic
    Information:
    Hydrochlorothiazide (hydrochlorthiazide) may be used in the control of hypotension and oedema With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Hydrochlorthiazide (Hydrochlorothiazide)
    Adelphan, Dichlotride, Diurex, Esidrex, Hydrochlorothiazide, Hydro-Diuril, HydroSaluric, Novo-Hydrazide, Thiuretic
    Conditionally Permitted
    Click to expand
    Definition: Diuretic
    Information:
    Hydrochlorthiazide (hydrochlorothiazide) may be used in the control of hypotension and oedema. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Hydrocodone
    Hycodan, Anexsia, Duradyne, Hycodan, Hycomine, Codamine
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    A semi-synthetic opioid that is used as an analgesic, and as a cough supressant in humans. Not approved for use in veterinary medicine. High possibility of affecting performance.
  • Hydrocortisone
    Alfacort, Aquanil HC, Bactine, Barriere HC, Calmicort, Cortate, Dermacort, Egocort, Hycort, Hydrocortisone, Hydrosone, Mildison, Nutracort, Proctocort, Schericur, Synacort, Texacort
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Hydrocortisone is used for the treatment of severe allergic reactions and various endocrine and skin disorders. Hydrocortisone is a Threshold Substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Hydroflumethiazide
    Saluron, Diucardin, Hydroflumethiazide
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Used for treating oedema in humans. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Hydromorphinol
    Numorphan
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It has similar effects to morphine such as sedation, analgesia and respiratory depression, but is more potent. Not commercially available for medicinal use in most countries.
  • Hydromorphone
    Palladone, Palladon, Dilaudid
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It has similar effects to morphine such as sedation, analgesia and respiratory depression, but is five times more potent. It is not a veterinary drug, but is sometimes used in pain management in dogs. Its use in pain management of horses as an an epidural injection has been investigated.
  • Hydroxy-gamma amino butyric acid (Hydroxy-GABA)
    Banned
    Click to expand
    Definition: Inhibitory neurotransmitter
  • Hydroxyamphetamine
    Paredrine, Paremyd
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Used in ophtalmic topical mydriatic combination products. Hydroxyamphetamine is an indirectly acting sympathomimetic agent which, when applied topically to the eye, causes the release of endogenous norepinephrine, resulting in mydriasis. The use of this substance is indicated for mydriasis in routine diagnostic procedures and in conditions where short term pupil dilation is desired. Not approved for systemic (injection) use. Possible side effects include psychotic reactions, behavioural disturbances and vasomotor or cardio-respiratory collapse, which have been reported with the use of anticholinergic drugs in humans.
  • Hydroxyephedrine (Oxilofrine)
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Hydroxytestosterone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A group of testosterone metabolites. Used for laboratory research only, not in medicinal use. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Hydroxyzine
    Alamon, Atara, Ataraxoid, Atarazoid, Atarox, Deinait, Durrax, Equipose, Fasarax, Hychotine, Neo-Calma, Neurozina, Nevrolaks, Pamazone, Paxistil, Placidol, Plaxidol, Tran-Q, Tranquizine, Traquizine, Vesparaz, Vesparaz-Wirkstoff
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Hydroxyzine may be used in the It is used for the control of itchiness related to allergies in horses. Its active metabolite is cetirizine, a Controlled Medication Substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Hyoscine (Scopolamine)
    Transderm-scop, Scopoderm
    Conditionally Permitted
    Click to expand
    Definition: Anticholinergic
    Information:
    Hyoscine may be used in the treatment of gastrointestinal tract spams such as colic. Hyoscine (Scopolamine) is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Hyoscyamine (Atropine isomer)
    Levsin, Buscopan
    Banned
    Click to expand
    Definition: Anticholinergic
    Information:
    Hyoscyamine is an anticholinergic used in the treatment of various gastrointestinal disorders including spasms, peptic ulcers, irritable bowel syndrome, pancreatitis, colic and cystitis, for the relief of symptoms. Commonly used in equine medicine to treat colics.
  • Ibandronate
    Boniva, Bondronat, Bonviva, Idandrix, Adronil, Bondrova, Bonprove
    Banned
    Click to expand
    Definition: Bone metabolism agent
    Information:
    A bisphosphonate drug used for the treatment of osteoporosis, fractures associated with cancer and hypercalcaemia. It is considered a risk to equine welfare and has no legitimate therapeutic indication in the equine athlete.
  • Ibogaine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Psychoactive indole
    Information:
    Ibogaine is a psychoactive indole alkaloid derived from the rootbark of an African plant. In large doses it can induce a dreamlike state for a period of hours. Ibogaine's current legal status in the UK, and much of the world, is that of an unlicensed, experimental medication. Ibogaine is a restricted substance (i.e. possession is illegal) in some countries, including the USA, Switzerland, Denmark, Sweden and Belgium. It is researched for its properties in treating alcohol and drug addictions. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Ibuprofen
    Actiprofen, Bifen, Brugesic, Burana, Dolgit, Faspic, Ibufen, Ibugel, Ibuleve, Ibumax, Ibumed, Ibuprofen, Ibusal, Ibumetin, Ibutop, Junifen, Nurofen, Perofen, Rupan, Solufen
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Ibuprofen may be used to relieve pain, inflammation and control fever. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Ibutilide
    Corvert
    Banned
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    A class III anti-arrhythmic agent used in the treatment of atrial fibrillation. Its use has not been described in horses, however it could be potentially effective.
  • Iloprost
    Ilomedine, Ventavis
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    Iloprost is a synthetic analogue of prostacyclin PGI2 which dilates arterial blood vessels. The drug is used in humans to treat pulmonary arterial hypertension (PAH), scleroderma, and ischaemia.
  • Imipramine
    Tofranil
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    Imipramine is a human antidepressant of the tricyclic class. Imipramine has been used to treat horses with narcolepsy and urospermia, although not approved for these indications, or any other indications for this species. It is also studied for use in pharmacologically induced ejaculation in stallions. High possibility of affecting performance.
  • Indacaterol
    Sequadra, Onbrez Breezhaler, Ultibro Breezhaler, Enerair Breezhaler, Arcapta Neohaler
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Indacaterol may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Indapamide
    Indapamide, Natrilix, Coversyl comp
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Used for treating oedema in humans. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Indomethacin
    Confortid, Elmetacin, Imbrilon, Indocid, Indocin, Indocin-SR, Indochron E-R, Indometacin, Indomod
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Indomethacin may be used to relieve pain and inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Indoprofen
    Flosin, Flosint, Isindone, Reumofen
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Not commerically available (withdrawn from the market). Used as a painkiller. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Indoramin
    Doralese, Baratol
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    An alpha-antagonist that is used for many diseases in humans, for example hypertension. Sedation and drowsiness may occur as side effects. No legitimate therapeutic indication in the equine athlete. Moderate possibility of affecting performance.
  • Infliximab
    Remicade
    Banned
    Click to expand
    Definition: Therapeutic antibody
    Information:
    Infiliximab is a synthetic antibody against an inflammatory mediator in tissues, as well as some inflammatory cells. It is used in some human auto-immune diseases like psoriasis, rheumatoid arthiritis and Crohn's disease, to lower the inflammatory response of the body. Not approved for use in veterinary medicine. May have some indications for use in equine inflammatory conditions, but has not been studied yet. Possibility to impact performance is high.
  • Ipratropium
    Aerovent, Apo-Ipravent, Apovent, Atronase, Atrovent, Bitrop, Disne Asmol, Ipratropium, Kendral-Ipratropium, Narilet, Rhinotrop, Rhinovent, Rinatec, Rinoberen, Rinovagos, Vagos
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Ipratropium may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Iprindole
    Galatur, Prondol, Tertran
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    Iprindole is a human antidepressant of the tricyclic class. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Iproniazid
    Marsilid, Iprozid, Ipronid, Rivivol, Propilniazida
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    Iproniazid is a human antidepressant. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Ipsapirone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    An anxiolytic and antidepressant used in research only. No legitimate therapeutic indication in the equine athlete. Possibility to affect performance is high.
  • Irbesartan
    Aprovel, Karvea, Avapro
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    Used for lowering blood pressure and treating kidney disease in humans with high blood pressure and diabetes mellitus. Not approved for use in veterinary medicine.
  • Isoaminile
    Peracon
    Banned
    Click to expand
    Definition: Antitussive
    Information:
    Isoaminile suppresses the cough reflex. May cause dizziness and have other central nervous system effects with large doses. Not registered for veterinary use.
  • Isocarboxazid
    Marplan
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    Isocarboxazid is a human antidepressive. In the United States, isocarboxazid is approved for the treatment of human depression, anxiety (panic disorder), with or without agoraphobia. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high. In the United Kingdom, isocarboxazid is licensed for the treatment of depression unresponsive to other types of antidepressives.
  • Isoetharine
    Bronkosol
    Banned
    Click to expand
    Definition: Beta 2 adrenergic receptor agonist
    Information:
    Used to prevent and treat bronchospasms in persons with certain lung diseases, like asthma. Not commercially available in the United States or EU. No legitimate therapeutic indication in the equine athlete.
  • Isoflupredone
    Predef, isofluprednisolone
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Isoflupredone may be used in the treatment of inflammatory skin diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Isomethadone
    Isomethadone I
    Banned
    Click to expand
    Definition: Analgesic
    Information:
    A narcotic analgesic. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Isometheptane
    Isonyl, Midrin, Midrid, Octanil, Octon
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is a cardiac and respiratory stimulant which also causes constriction (narrowing) of blood vessels. It is used in the treatment of migraines and tension headaches, in combination with painkillers. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Isometheptene
    Midrin, Amidrine
    Banned
    Click to expand
    Definition: Sympathomimetic
    Information:
    Isometheptene restricts blood flow by narrowing the blood vessels, and is therefore used in tension headaches and migraines, in combination with other substances like paracetamol. Not approved for use in equine medicine. No legitimate therapeutic indication in the equine athlete.
  • Isoprenaline (Isoprotorenol)
    Isuprel
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    It is closely related to epinephrine. Its primary use is for bradycardia, or heart block, or as an inhalor drug for asthma in humans. Not approved for use in veterinary medicine.
  • Isopropamide
    Isamid, Marygin-M, Piaccamide, Priazimide, Sanulcin
    Banned
    Click to expand
    Definition: Anticholinergic
    Information:
    Isopropamide is a long acting anticholinergic. It is used in various gastrointestinal disorders. Not currently commercially available in EU or USA (discontinued).
  • Isoproterenol (Isoprenaline)
    Isuprel
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    It is closely related to epinephrine. Its primary use is for bradycardia, or heart block, or as an inhalor drug for asthma in humans. Not approved for use in veterinary medicine.
  • Isopyrin (Ramifenazone)
    Delta-Tomanol, Tomanol
    Banned
    Click to expand
    Definition: Pain relief
    Information:
    Used as a painkiller and anti-inflammatory. Not commercially available in USA or EU. Not approved for use in veterinary medicine.
  • Isosorbide dinitrate
    Isordil
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    This is a nitrate used in human medicine for dilating blood vessels in angina pectoris, and to treat congestive heart failure. Not approved for use in equine medicine. No legitimate therapeutic indication in the equine athlete.
  • Isothipendyl
    Apaisyl, Actapront, Istamyl, Sedermyl
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    Isothipendyl is an antihistamine used as an anti-allergic drug in humans. May have a sedative effect. Not approved for veterinary use. May affect performance. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Isoxicam
    Maxicam, Pacyl, Vectren
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Not commerically available. Used as a painkiller. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Isoxsuprine Hydrochloride
    Duvadilan, Fenam, Vadosilan, Vasosuprina Ilfi, Xuprin
    Permitted
    Click to expand
    Definition: Vasodilator
    Information:
    Isoxsuprine may be used in the treatment of vascular diseases of the lower limb. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Isradipine
    Isradipine, Lomir
    Banned
    Click to expand
    Definition: Calcium channel blocker
    Information:
    Used in the treatment of hypertensive states in humans. No legitimate therapeutic indication in the equine athlete.
  • Kebuzone
    Chebutan, Chepirol, Chetopir, Ketazon
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Not commerically available. Used as a painkiller. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Ketamine
    Ketajet, Vetalar, Ketanest, Ketaset, Ketalar
    Conditionally Permitted
    Click to expand
    Definition: Anaesthetic
    Information:
    Ketamine is a general anaesthetic resulting in sedation, immobility, analgesia and amnesia. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Ketazolam
    Anseren, Ansietil, Sedatival, Sedotime, Solatran, Unakalm
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is a benzodiazepine, and so has anxiolytic, anticonvulsant, sedative and muscle-relaxant properties. Not approved for use in veterinary medicine, but may have some medicinal indications for its use in equine medicine.
  • Ketoprofen
    Alrheumat, Capisten, Fastum, Kenhancer, Ketoartril, Ketofen, Ketoprofene, Meprofen, Orudis, Profenid, Tafirol
    Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Ketoprofen may be used to relieve pain, inflammation and control fever. The detection time is estimated with 96 hours (4 days) after intra-venous administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Ketorolac
    Acular, Ketorolac, Toradol, Tora-Dol
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Ketorolac may be used to relieve pain, inflammation and control fever. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Ketotifen
    Ketotifen oral, Zaditor, Alaway, Zyrtec Itchy Eye, Claritin Eye
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    In its ophthalmic form, this substance is used in humans to treat allergic conjunctivitis. In its oral form, it is used for asthma attacks. May have a sedative effect. Not approved for use in veterinary medicine. Potential to influence performance is high. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Krypton
    Banned
    Click to expand
    Definition: Hypoxia Inducible Factor Activator
    Information:
    A noble gas that can be used in hypobaric chambers to produce hypoxia. It has no legitimate therapeutic indication in the equine athlete.
  • Labetalol
    Albetol, Labetalol, Trandate
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    Used in the treatment of pregnancy induced hypertension or other hypertensive states in humans. No legitimate therapeutic indication in the equine athlete.
  • Lamotrigine
    Lamictal, Lamotrigine
    Banned
    Click to expand
    Definition: Anticonvulsant
    Information:
    Used to control seizures, like in epilepsy, and mood changes in bipolar disorder in humans. Not approved for veterinary use. Not commonly used in equine medicine. High possibility of affecting performance.
  • Lenperone
    Elanone-V
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    An anxiolytic and anti-emetic agent. Used in research only. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Leptazole (Pentylenetetrazole)
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Letosteine
    Broluidal, Viscotiol, Letofort
    Banned
    Click to expand
    Definition: Mucolytic
    Information:
    A mucolytic used in many human medicines for cold symptoms. Not commercially available in USA or EU. Not approved for use in veterinary medicine.
  • Letrozole
    Femar, Femara, Letrolan
    Banned
    Click to expand
    Definition: Aromatase inhibitor
    Information:
    Prevents the biosynthesis of oestrogen. Used in the treatment of breast cancer in women. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Levallorphan
    Lorfan
    Banned
    Click to expand
    Definition: Opiod antagonist
    Information:
    This substance is related to morphine, but counteracts the respiratory depression produced by morphine poisoning, without affecting its analgesic effects. The product is discontinued in several countries, including USA. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Levamisole
    Decaris, Ergamisol, Ketrax
    Conditionally Permitted
    Click to expand
    Definition: Anti-parasitic
    Information:
    Levamisole may be used in the treatment of parasitic diseases. Its metabolites include aminorex, a Controlled Medication. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Levobunolol
    Akbeta, Betagan, Levobunolol Hydrochloride
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    Used in the topical treatment of glaucoma in humans. It reduces intraocular pressure. Not approved for use in veterinary medicine, but may have some indications for horses with eye conditions.
  • Levocabastine
    Livostin
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Levocabastine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Levodopa
    Atamet, Levodopa, Madopar, Parcopa, Prolopa, Sinemet, Stalevo
    Banned
    Click to expand
    Definition: Di hydroxythenylalanine substitute
    Information:
    Used for treating symptoms of Parkinson's disease in humans. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. Possibility to affect performance is high.
  • Levomethadone
    L-Polamidon, L-Polamidon C
    Conditionally Permitted
    Click to expand
    Definition: Opioid
    Information:
    Levomethadone (levomethadone hydrochloride) may be used to relieve pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Levomethorphan
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    An opioid analgesic, not commercially available. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Levophacetoperane
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Boosts brain uptake of catecholamines
    Information:
    An antidepressant with anorexigenic properties. Not commercially available in USA or EU. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Levorphanol
    Levorphanol Tartrate, Levo-Dromoran
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It has similar effects to morphine such as sedation, analgesia and respiratory depression, but is more potent, and has a longer half-life. Therefore it is used in treating chronic, severe pain. Not commercially available in all countries. Not approved for, and not commonly used in, veterinary medicine.
  • Levothyroxine
    L Thyroxin, T4, Eltroxin, Euthyrox, Letterbox, Levaxin, L-thyroxine, Thyrax, Levoxyl, Synthroid, Thyrax Duotab, Thyrox, Eutirox, Tirosint, Thyrin, Thyrolar
    Conditionally Permitted
    Click to expand
    Definition: Hormone
    Information:
    Levothyroxine may be used in the treatment of hypothyroidism. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • LGD-4033
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An investigational selective androgen receptor modulator (SARM) used for treatment of muscle wasting with no legitimate therapeutic indication in the equine athlete
  • Lidocaine
    Anestacon, Dalcaine Lidocaine, Laryng-O-Jet, Leostesin, Lidocaine, Neo-Novutox, Rapidocaine, Xylocaine, Xylotox
    Conditionally Permitted
    Click to expand
    Definition: Local anaesthetic
    Information:
    Lidocaine is used for the temporary local relief of pain. The detection time is estimated with 48 hours (2 days) after subcutaneous administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Lidoflazine
    Clinium, Corflazine, Klinium, Ordiflazine
    Banned
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    A long acting coronary vasodilator with some anti-arrhythmic action. Its use has not been described in horses, however it could potentially be effective.
  • Lisinopril
    Prinivil, Zestril
    Banned
    Click to expand
    Definition: Angiotensin-converting enzyme inhibitor
    Information:
    Lisinopril is an angiotensin converting enzyme (ACE) inhibitor drug, used in humans for the treatment of hypertension, congestive heart failure, heart attacks and also in preventing the renal and retinal complications of diabetes. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Lithium
    Eskalith, Lithane, Lithium carbonate, Lithium Citrate
    Banned
    Click to expand
    Definition: Mood stabiliser
    Information:
    Lithium salts are used as mood stabilisers in humans with bipolar disorders. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Lobeline
    Desista, Habit-X, Lobatox, Lobidan, Nicoban, Refrane, Smokeless, Stopsmoke, Test Sixty, Unilobin
    Banned
    Click to expand
    Definition: Respiratory stimulant
    Information:
    Lobeline is an alkaloid derived from the leaves of an Indian tobacco plant, and has been widely used in commercial smoking remedies. The respiratory stimulant, Lobeline, has been used in equine clinical practice to increase inspiratory and expiratory airflow rates at rest in order to facilitate investigation of both lower, and upper, airway function.
  • Lofentanil
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It has similar effects to morphine such as sedation, analgesia and respiratory depression, but is more potent and has a a very long half-life. The strong effect, long duration and potential side effects make its medicinal use complicated, and it is mainly used for research purposes. Not commercially available in many countries, for example USA or EU. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. Possibility to affect performance is high.
  • Lofepramine
    Gamanil, Tymelyt
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    Lofepramine is a human antidepressant of the tricyclic class. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Loperamide
    Lopex, Imodium, Dimor, Pepto Diarrhea Control
    Conditionally Permitted
    Click to expand
    Definition: Opioid agonist
    Information:
    Loperamide may be used in the treatment of digestive tract diseases such as diarrhoea. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Loprazolam
    Dormonoct, Havlane, Somnovit
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is a benzodiazepine, and so has anxiolytic, anticonvulsant, sedative and muscle-relaxant properties. Not approved for use in veterinary medicine. Possibility to affect performance is high.
  • Loratadine
    Claritine, Clarityn, Fristamin, Tidilor
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Loratadine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Lorazepam
    Ativan
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is a benzodiazepine, and so has anxiolytic, anticonvulsant, sedative and muscle-relaxant properties. Not approved for use in veterinary medicine. High possibility of affecting performance.
  • Lormetazepam
    Noctamid, Ergocalm, Loramet, Dilamet, Sedaben
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is a benzodiazepine, and so has anxiolytic, anticonvulsant, sedative and muscle-relaxant properties. Not approved for use in veterinary medicine. Not approved in Canada or USA. High possibility of affecting performance.
  • Lornoxicam
    Xefocam
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Used as a painkiller and anti-inflammatory. Not approved for use in veterinary medicine.
  • Losartan
    Cozaar, Hyzaar
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    A human medicine that is indicated for the treatment of hypertension. Not approved for use in veterinary medicine
  • Loxapine
    Loxapac, Loxitane
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Used primarily in the treatment of schizophrenia in humans. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Lucanthone
    Nilodin
    Banned
    Click to expand
    Definition: Radiation sensitizer
    Information:
    Lucanthone is used in combination with radiation or chemotherapy for the treatment of brain tumours in humans. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete.
  • Lumiracoxib
    Prexige
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Used as an anti-inflammatory and painkiller. Not commercially available in USA or EU. Not approved for use in veterinary medicine.
  • Mabuterol
    Broncholin
    Banned
    Click to expand
    Definition: Beta agonist
    Information:
    Beta agonists relax smooth muscle in airways, and are used to treat conditions like asthma. Not commercially available in the United States or EU. No legitimate therapeutic indication in the equine athlete.
  • Madol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A synthetic anabolic steroid, specifically produced for human performance enhancement. It has no legitimate therapeutic indication in the equine athlete
  • Magnesium sulphate (injection)
    Magnesium sulphate, MgSO4
    Conditionally Permitted
    Click to expand
    Definition: Inorganic compound
    Information:
    Magnesium sulphate injections may be used in the control of pain and have a calming effect. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Maprotiline
    Deprilept, Ludiomil, Psymion
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    A human antidepressant with sedative and anxiolytic properties. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mazindol
    Mazanor, Sanorex
    Banned
    Click to expand
    Definition: Anorexic
    Information:
    Anorectic drug. Mazindol is a re-uptake inhibitor of noradrenaline, dopamine, and also serotonin. It supresses appetite, and has a medical indication in controlling obesity. Potential for abuse within all equestrian sporting disciplines. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • MDA (Methylenedioxyamphetamine)
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    MDA (Methylenedioxyamphetamine) is a psychedelic stimulant of the amphetamine class. MDA has no accepted medical use. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • MDEA (Methylenedioxyethylamphetamine)
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    MDEA (Methylenedioxyethylamphetamine) is a psychedelic stimulant of the amphetamine class. MDA has no accepted medical use. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • MDMA (Methylenedioxymethamphetamine)
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    MDMA is considered unusual for its tendency to diminish feelings of fear and anxiety. These effects have led some to suggest it might have therapeutic benefits in certain individuals. MDMA is criminalised in most countries in the world, although some limited exceptions exist for scientific and medical research. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mebanazine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Mono-amine oxidase inhibitor
    Information:
    Used in the treatment of depression in humans. Not commercially available in USA or EU. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mebeverine
    Colofac, Duspatal
    Banned
    Click to expand
    Definition: Antispasmodic
    Information:
    Indications for use are irritable bowel syndrome and gastrointestinal spasms in humans. Not approved for use in veterinary medicine, but may have potential for use as a treatment in horses with similar conditions.
  • Mebhydroline
    Bexidal, Diazolin, Fabahistin
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    Mebhydrolin (INN) or mebhydroline is an antihistamine, used for symptomatic relief of allergic symptoms in humans. May cause sedation. It is not available in the United States, but it is in various other countries. Not approved for veterinary use. May affect performance. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Mebutamate
    Dormate
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Mebutamate is a sedative and anxiolytic drug with antihypertensive (blood pressure lowering) effects. Not available in most European countries, and discontinued in the USA. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mecamylamine
    Mecamylamine Hydrochloride
    Banned
    Click to expand
    Definition: Nicotine antagonist
    Information:
    Used in the treatment of hypertension and used in human medicine to help stop smokers. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete.
  • Meclizine
    Antivert, Bonine, Meclizine HCl
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    An antihistamine which is also used to control vertigo and motion sickness in humans. May cause mild sedation and drowsiness. Not approved for use in equines. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Meclofenamic Acid
    Lenidolor, Meclodol, Meclofenamate, Meclomen, Movens
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Meclofenamic acid may be used to relieve pain and inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Meclofenoxate
    Lucidril
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Meclofenoxate is a drug used to treat the symptoms of senile dementia and Alzheimer's disease. Small amounts can be found naturally in some foods, especially fish, and is also a natural metabolite of choline in the body system. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete.
  • Meconine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Opiod
    Information:
    Primary metabolite of noscapine. Meconine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance.
  • Medazepam
    Nobrium, Rudotel, Raporan, Ansilan
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is a benzodiazepine, and so has anxiolytic, anticonvulsant, sedative and muscle-relaxant properties. Not approved for use in veterinary medicine. Not approved in Canada or USA. High possibility of affecting performance.
  • Medetomidine
    Domitor
    Conditionally Permitted
    Click to expand
    Definition: Sedative
    Information:
    Medetomidine may be used for sedation and anaesthetic premedication in horses. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Medroxyprogesterone (Medroxyprogesterone Acetate)
    Depo-Provera, Dilena, Divina, Enaf, Farlutes, Premelle, Provera
    Banned
    Click to expand
    Definition: Progestin
    Information:
    Used the in treatment of menstrual disorders (irregular periods, also menopause). Medroxyprogesterone is often used synonymously to 'Medroxyprogesterone Acetate'. The latter is usually the substance that is usually administered in practice. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Medroxyprogesterone Acetate (Medroxyprogesterone)
    Depo-Provera, Dilena, Divina, Enaf, Farlutes, Premelle, Provera
    Banned
    Click to expand
    Definition: Progestin
    Information:
    Used the in treatment of menstrual disorders (irregular periods, also menopause). Medroxyprogesterone is often used synonymously to 'Medroxyprogesterone Acetate'. The latter is usually the substance that is usually administered in practice. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Medrylamine
    Postafen
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    It is used for the treatment of allergic skin disorders. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Medrysone
    HMS
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    An ophthalmic solution that is not commerically available at the moment. It is indicated for the treatment of allergic conjunctivitis, vernal conjunctivitis, episcleritis, and epinephrine sensitivity in humans. Not approved for use in veterinary medicine.
  • Mefenamic acid
    Ponstel, Ponstan, Ponstal, Parkemed, Mafepain, Mephadolor, Meftal, Dyfenamic, Potarlon, Dolfenal
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Used as painkiller and anti-inflammatory. Not approved for use in veterinary medicine, but it is sometimes prescribed for the oral administration of anti-inflammatories in equine medicine.
  • Mefenorex
    Rondimen, Pondinil
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Mefenorex is an amphetamine derivative stimulant drug, which was used as an appetite suppressant for treating obesity. Mefenorex produces amphetamine as a metabolite, and has been withdrawn in many countries. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mefexamide
    Méféxadyne, Perneuron, Timodyne
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Mefexamide is a stimulant antidepressant, which is not commercially available for medicinal use. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mefruside
    Baycaron
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Not commercially available in USA or EU. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Meldonium
    Mildronate
    Banned
    Click to expand
    Definition: Anti-ischaemic
    Information:
    Meldonium is a substances used to treat ischaemia in coronary artery disease. It can be used to enhance performance and improve recovery time after exercise by increasing blood flow throughout the body. The substance also has anti-convulsant effects.
  • Meloxicam
    CO Meloxicam, Dom-Meloxicam, Gen-Meloxicam, Meloxicam, Metacam, Mobic, Mobicox, Movalis, Movatec, Novo-Meloxicam, Parocin, Petcam, PHL-Meloxicam, PMS-Meloxicam, Tenaron
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Meloxicam may be used to relieve pain, inflammation and control fever. The detection time is estimated with 72 hours (3 days) after oral administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Melperone
    Buronil, Burnil, Eunerpan
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Used primarily in the treatment of schizophrenia in humans. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Memantine
    Axura, Ebixa, Namenda
    Banned
    Click to expand
    Definition: N-methyl D-asparate receptor antagonist
    Information:
    Used in the treatment of Alzheimer type dementia in humans. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete.
  • Meparfynol
    Allotropal, Anti-Stress, Dormison, Oblivon
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    A hypnotic sedative. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mepazine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Used primarily in the treatment of schizophrenia in humans. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mepenzolate
    Cantil
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    Mepenzolate relieves cramping of the gastrointestinal tract, and acid secretion of the stomach. It is used in the treatment of peptic ulcers in humans. Not approved for use in veterinary medicine. May have potential for treating horses with similar conditions, but has not been used in equine medicine so far.
  • Meperidine (Pethidine)
    Mepergan, Demerol, Meperidine Hydrochloride
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    Fast acting, opioid, analgesic drug. Not approved for use in veterinary medicine.
  • Mephenesin
    Decontractyl, Myanesin, Relaxar, Rhex
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    Used as a muscle relaxant in anaesthesia in humans, and also for treating anxiety tension states. Not commercially available in the USA or EU. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mephentermine
    Wyamine sulfate
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Mephentermine is a cardiac stimulant with psychoactive properties. Not commercially available now for medicinal use anymore in most countries. There is some recognised misuse of this substance. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mephenytoin
    Mesantoin
    Banned
    Click to expand
    Definition: Anticonvulsant
    Information:
    Mephenytoin is no longer available in the USA or the EU. It is a drug used to control seizures. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mephobarbital
    Mebaral
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Mephobarbital is used as a sedative, anxiolytic and anticonvulsant in humans. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. Possibility to affect performance is high.
  • Mepindolol
    Betagon, Corindolan, Mepicor
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    Used in glaucoma treatment. Not commercially available in the USA or EU. Not approved for use in veterinary medicine.
  • Mepivacaine
    Carbocain, Carbocaine, Intra-Epicaine, Isocaine, Meaverin, Mepicaton, Mepivacaine, Mepivastesin, Polocaine, Scandicain, Scandicaine, Scandinibsa
    Conditionally Permitted
    Click to expand
    Definition: Local anaesthetic
    Information:
    Mepivacaine is used for the temporary local relief of pain. The detection time is estimated with 48 hours (2 days) after subcutaneous administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Meprednisone
    Betapar, Cortipyren B, Deltisona B, Latisona B, Prednisonal
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    It is a methylated derivative of prednisone. Not commercially available. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Meprobamate (Meprobromate)
    Meprobamate
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    Used as a mild sedative and analgesic. Also in combination with other substances as a muscle relaxant. Possibility to affect performance is high.
  • Meprobromate (Meprobamate)
    Meprobamate
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    Used as a mild sedative and analgesic. Also in combination with other substances as a muscle relaxant. Possibility to affect performance is high.
  • Meprylcaine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    Topical local anaesthetic. Not commercially available, for example, in USA or EU. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Meptazinol
    Meptid
    Banned
    Click to expand
    Definition: Opioid analgesic
    Information:
    A analgesic that was mainly used in human obstetrics (childbirth related procedures), but is now discontinued in many countries. Meptazinol exhibits not only a short onset of action, but also a shorter duration of action relative to other opioids. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mepyramine (Pyrilamine)
    Albatussin, Anthisan
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Mepyramine (Pyrilamine) may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Meralluride
    Mercuhydrin
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    A mercurial diuretic that is not commercially available in USA or EU. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Merbaphen
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    A diuretic that is no longer commercially available in USA or EU. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mercaptomerin
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Not commercially available in USA or EU. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mersalyl
    Diursal, Igrosin, Mercurital, Mercusal, Salyrgan, Uragan
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Not commercially available in USA or EU. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mesalamine (Mesalazine)
    Asacol, Delzicol, Lialda, Mezavant, Octasa, Pentasa, Salofalk, Zintasa
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Mesalamine (Mesalazine) may be used to treat diseases of the digestive tract. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Mesalazine (Mesalamine)
    Asacol, Delzicol, Lialda, Mezavant, Octasa, Pentasa, Salofalk, Zintasa
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Mesalamine (Mesalazine) may be used to treat diseases of the digestive tract. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Mesocarb
    Sydnocarb
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Mesocarb is a stimulant drug which acts as a dopamine re-uptake inhibitor. Mesocarb is used for a variety of applications in humans; these include counteracting the sedative effects of benzodiazepine drugs, increasing workload capacity and cardiovascular function, treatment of Attention Deficit Hyperactive Disorder (ADHD) and hyperactivity in children,and as a drug to enhance resistance to extremely cold temperatures. It is also listed as having antidepressant and anticonvulsant properties. Mesocarb is sold in Russia as 5 milligram tablets. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mesoridazine
    Serentil
    Banned
    Click to expand
    Definition: Neuroleptic
    Information:
    Used in the treatment of schizophrenia. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mestanolone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An orally bioavailable synthetic steroid hormone. It has androgenic and anabolic activity, with short term effects and excretion time. Mestanolone is commercially available in Japan. It has been abused to improve physical performance for its anabolic effects in both human sports and horseracing. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Mesterolone
    Proviron
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An orally bioavailable synthetic anabolic and androgenic steroid (AAB) derived from dihydrotestosterone. Used therapeutically as an antidepressant in humans. It has reportedly been abused in human sports, and is a potential doping agent in equine sports. Mesterolone has been banned by the Food and Drug Administration (FDA). No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Metaclazepam
    Talis
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    An anxiolytic with mild sedative effect. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Metamizole (Dipyrone)
    Adolkin, Alginodia, Dolemicin, Lasain, Metilon, Minalgin, Neo-Melubrine, Nolotil, Novalgin, Novaminsulfon, Novemina, Optalgin, Vetalgin
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Metamizole (Dipyrone) may be used to relieve pain and spasms. The detection time is estimated with 72 hours (3 days) after intravenous administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Metaproterenol
    Alotec, Alupent, Metaprel, Metaproterenol
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    Metaproterenol is a bronchodilator. It works by relaxing muscles in the airways to improve breathing. Not approved for use in veterinary medicine.
  • Metaraminol
    Aramine, Metaraminol Bitatrate
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Metaraminol is stimulates the alpha-receptors, and has potential for misuse in the equine athlete. It is used in the prevention and treatment of low blood pressure occurring with spinal anaesthesia hemorrhage, reactions to medications, surgical complications, and shock associated with brain damage baused by trauma or tumour. The sale of this product is discontinued in some countries.
  • Metaxalone
    Skelaxin
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    A muscle relaxant used to relax muscles and relieve pain caused by musculoskeletal conditions. Not approved for use in veterinary medicine.
  • Metazocine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    An opioid analgesic, not commercially available for medicinal use because of its hallucinogenic properties. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Metformin
    Glucophage XR, Carbophage SR, Riomet, Fortamet, Glumetza, Obimet, Gluformin, Dianben, Diabex, Diaformin, Siofor and Metfogamma.
    Conditionally Permitted
    Click to expand
    Definition: Anti-hyperglycaemic
    Information:
    Metformin may be used in the treatment of Equine Metabolic Syndrome. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Methacholine
    Mecholyl, Methacholine, Provocholine, Provokit
    Banned
    Click to expand
    Definition: Hypotensive
    Information:
    Methacholine is used to diagnose bronchial hyperreactivity, which is the hallmark of asthma and also occurs in chronic obstructive pulmonary disease. Not validated, but may have potential use in equine medicine.
  • Methadone
    Dolmed, L-Polamivet, Methadose, Westadone
    Conditionally Permitted
    Click to expand
    Definition: Opioid
    Information:
    Methadone may be used to relieve pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Methallenestril
    Vallestril
    Banned
    Click to expand
    Definition: Oestrogen
    Information:
    An oestrogen hormone twith anabolic properties. Previously used to treat menopausal women, but no longer commercially available, for example, in USA or EU anymore. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methamphetamine
    Desoxyn
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Methamphetamine is a sympathomimetic amine with CNS stimulant activity. It also causes an elevation of blood pressure and dilation of airways. It is widely abused as an recreational drug, and the only medical indication is in the treatment of severe obesity in humans non-responsive to other treatment options. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methandienone
    Anabol, Dianabol, Melic
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An orally bioavailable synthetic anabolic and androgenic steroid (AAB). It has no legitimate medical use, it is abused by human body builders, and is banned by the Food and Drug Administration (FDA). No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methandriol
    Sinesex, Stenediol, Troformone
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    It is a synthetic adrostenediol derivative, ana an anabolic steroid with some androgenic properties. It is abused by human body builders and is banned by the Food and Drug Administration (FDA). No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methandrostenolone
    Dianabol, Danabol, Reforvit-b
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An orally bioavailable synthetic anabolic and androgenic steroid (AAB), with no legitimate medical use. It is abused by human body builders, and is banned by the Food and Drug Administration (FDA) under the Controlled Substances Act. Production has ceased in Western Europe and the USA, although it is still readily available in certain South American, Asian and Eastern European countries. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methantheline
    Asabaine, Avagal, Banthin, Dixamone, Doladene, Frenogastrico,Gastrin-1 Human, Gastrin I, Gastrosedan, Metantyl, Metaxan, Methanide, Resobantin, Ulcine, Ulcudexter, Vagamin, Xanteline
    Banned
    Click to expand
    Definition: Antimuscarinic
    Information:
    Suggested use in for treating peptic ulcers in humans, in conjunction with other treatments. May also have potential for use in equine peptic ulcers as well, but has not been reported or studied yet.
  • Methapyrilene
    Paradormalene, Pyrathyn, Pyrinistab, Pyrinistol, Rest-On, Restryl, Semikon, Tenalin, Thionylan
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    No longer in medicinal use in most countries due to its liver-toxicity. It has a relatively strong sedative effect, so its primary use was as a medication for insomnia. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Methaqualone
    Mandrax
    Banned
    Click to expand
    Definition: Sedative
    Information:
    A sedative and muscle relaxant that was used as a sleeping pill in the 1970s. It is also widely misused. Both medical and non-medical use led to many fatal overdoses,and the drug was withdrawn in the 1980s. However it is still manufactured in India, and is a street drug in some countries of Africa and other areas of the world. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Metharbital
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It is a barbiturate anticonvulsant, previously used in the treatment of epilepsy, but no longer sold for medicinal use. It has similar properties to phenobarbital. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methasterone
    Methasteron, Superdrol, Methyldrostanolone
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An orally bioavailable synthetic anabolic and androgenic steroid (AAB). Methasterone is not controlled by the Food and Drug Administration, and is commercially available in many countries. Methasterone has no legitimate medical use. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methazolamide
    Methazolamide
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Methazolamide tablets are used to decrease eye pressure in people with glaucoma. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methcathinone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Psychoactive
    Information:
    Methcathinone is a psychoactive substance that is used as a recreational drug. Not legal under any circumstances, for example in the USA due to its classification as a Schedule I substance. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methdilazine
    Bristaline, Dilosyn, Disyncram, Tacaryl, Tacazyl, Tacryl
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    An antihistamine which also has antibacterial action. Although potentially useful in the future, currently there is no legitimate therapeutic indication in the equine athlete. High possibility of affecting performance. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Methenolone
    Primobolan
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Long acting anabolic steroid with some androgenic properties. It is frequently abused by human athletes, and there is potential for abuse in racehorses. Methenolone has been banned by the U.S Food and Drug Administration (FDA). No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methimazole
    Tapazole, Felimazole
    Banned
    Click to expand
    Definition: Antihyperthyroidsim
    Information:
    Methimazole is a drug used to treat hyperthyroidism in humans and cats. May cause drowsiness. No legitimate therapeutic indication in the equine athlete. May affect performance.
  • Methixene
    Tremaril
    Banned
    Click to expand
    Definition: Antispasmodic
    Information:
    Methixene is used as an anticholinergic, antispasmodic, or antiparkinsonism drug. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete.
  • Methocarbamol
    Delaxin, Lumirelax, Methocarbamol, Miowas, Robaxin, Traumacut, Tresortil
    Permitted
    Click to expand
    Definition: Muscle relaxant
    Information:
    Methocarbamol may be used in the treatment of muscle spasms and pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Methohexital
    Brevital Sodium
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Methohexital sodium is a rapid, ultrasfast acting barbiturate anaesthetic that is used in the induction of anaesthesia in humans. Not commonly used in veterinary medicine, but could possibly be similarly used for induction of anaesthesia in animals. Not approved for use in veterinary medicine. High possibility of affecting performance.
  • Methotrexate
    Trexall, Rheumatrex
    Banned
    Click to expand
    Definition: Immunomodulator
    Information:
    Used in cancer treatments, auto-immune diseases and early pregnancy determination drugs. No legitimate therapeutic indication in the equine athlete.
  • Methotrimeprazine
    Nozinan
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Used in humans to treat psychotic disturbances, aniexty and tension but also as a sedative. It also has an analgesic effect. Not approved for veterinary use. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methoxamine
    Idasal, Vasoxine, Vasoxyl, Vasylox
    Banned
    Click to expand
    Definition: Vasoconstriction
    Information:
    Methoxamine is an α1-adrenergic receptor agonist, similar in structure to, for example, phenylephrine. It induces vasoconstriction of skin blood vessels, thereby increasing arterial blood pressure. The effect of methoxamine in raising blood pressure in horses during anaesthesia has been studied, and no beneficial effects were found. Therefore, very few, if any, therapeutic indications exist for use in equine medicine. Not approved for use in veterinary medicine. Moderate possibility of affecting performance.
  • Methoxyphenamine
    Asmi, Euspirol, Orthoxine, Ortodrinex, Proasma
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    A sympathomimetic bronchodilator. Not approved for veterinary medicine. Not commercially available. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methoxypromazine
    Trade names are not currently listed on this site.
    Conditionally Permitted
    Click to expand
    Definition: Sedative
    Information:
    Methoyxpromazine may be used for sedation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Methscopolamine (Methyl Scopolamine)
    Pamine
    Banned
    Click to expand
    Definition: Muscarinic antagonist
    Information:
    Methscopolamine (Methyl Scopolamine) is used to reduce stomach acid secretion to help control peptic ulcers. Not approved for use in veterinary medicine.
  • Methsuximide
    Celontin
    Banned
    Click to expand
    Definition: Anticonvulsant
    Information:
    Methsuximide is an anticonvulsant. It works by reducing abnormal nerve transmission in the brain, which helps decrease seizures. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. Non-steroidal anti-inflammatory drug
  • Methyclothiazide
    Methyclothiazide, Enduron
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Methyclothiazide is used as a diuretic and antihypertensive in human patients. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methyl Scopolamine (Methscopolamine)
    Pamine
    Banned
    Click to expand
    Definition: Muscarinic antagonist
    Information:
    Methyl Scopolamine (Methscopolamine) is used to reduce stomach acid secretion to help control peptic ulcers. Not approved for use in veterinary medicine.
  • Methylaminorex
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    4-Methylaminorex has effects comparable to methamphetamine, but with a much longer duration. It is abused as a recreational drug, and is classified as an illegal drug in many countries. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methylatropine
    Mintussin, Mydriasin, Tropin
    Banned
    Click to expand
    Definition: Anticholinergic
    Information:
    An atropine derivative that has an effect on blood pressure, gastrointestinal spasms and airways. Not in medical use, and not available commercially. Currently no legitimate therapeutic indication in the equine athlete.
  • Methylchlorthiazide (Methylclothiazide)
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Not commercially available in USA or EU. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methylclothiazide (Methylchlorthiazide)
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Not commercially available in USA or EU. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methyldienolone
    Methyldien
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A very potent anabolic synthetic steroid, with some androgenic activity. No medical use, and little abuse to date, although there is a lot of potential for this both human, and equestrian sports.
  • Methyldihydromorphinone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    An opioid analgesic, not commercially available for medicinal use. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methyldopa
    Aldomet, Aldoril, Dopamet
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    A human medicine that is indicated for the treatment of hypertension. Not approved for use in veterinary medicine.
  • Methylenedioxyamphetamine (MDA)
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Methylenedioxyamphetamine (MDA) is a psychedelic stimulant of the amphetamine class. MDA has no accepted medical use. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methylenedioxyethylamphetamine (MDEA)
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Methylenedioxyethylamphetamine (MDEA) is a psychedelic stimulant of the amphetamine class. MDA has no accepted medical use. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methylenedioxymethamphetamine (MDMA)
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Methylenedioxymethamphetamine (MDMA) is considered unusual for its tendency to diminish feelings of fear and anxiety. These effects have led some to suggest it might have therapeutic benefits in certain individuals. MDMA is criminalised in most countries in the world, although some limited exceptions exist for scientific and medical research. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methylephedrine
    Codaewon, Coughmin, Ilvico Syrup, Ilvico Liquid, Methorcon, Tussoretardin
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    A central nervous system stimulant that is sometimes used in diet pills or cough supressants. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methylergonovine
    Methergine
    Banned
    Click to expand
    Definition: Vasoconstriction
    Information:
    Methylergonovine is a uterine stimulant. It works by increasing uterine contractions, and is used in humans for reducing blood loss after the delivery of a baby. Not approved for use in equine medicine. No legitimate therapeutic indication in the equine athlete.
  • Methylhexanamine
    Iron Tiger, Forthane, Geranamine, DMAA, Floradrene
    Banned
    Click to expand
    Definition: Sympathomimetic
    Information:
    Methylhexanamine is a stimulant that can affect performance and has no legitimate use in sports horses
  • Methylhexaneamine
    Geranamine
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Previously used as a nasal decongestant, methylhexaneamine is currently marketed as a dietary supplement in combination with other substances, for example caffeine. No legitimate therapeutic indication in the equine athlete. Moderate possibility of affecting performance.
  • Methylmethcathinone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Psychoactive
    Information:
    Methylmethcathinone is a psychoactive substance used as a recreational drug. Classified as an illegal drug in some countries, and as a medicine in others, it is not commercially available for medicinal use in most countries. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methylnortestosterone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A potent synthetic androgen. There is little evidence of the usage of this steroid in any species to date, however researchers are looking into its potential use for spermatogenic suppression in men.
  • Methylphenidate
    Ritalin
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    This is a psychostimulant that works by increasing the activity of the central nervous system. Its effects include increasing or maintaining alertness, combating fatigue, and improving attention. It is used in humans, for example, in the treatment of ADHD (Attention Deficit Hyperactivity Disorder) and narcolepsia. Methylphenidate makes horses hyperresponsive to auditory and visual stimuli. Not approved for use in equine medicine. May have potential for treating equine narcolepsy but has not been studied or reportedly used, for that indication.
  • Methylprednisolone (Methylprednisolone Acetate)
    Besonia, Depomedrol, Esametone, Lemod, Medesone, Medixon, Medlone, Medrol Dosepak, Medrone, Mesopren, Metastab, Methylprednisolone, Metrisone, Metrocort, Metysolon, Promacortine, Reactenol, Summicort
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Methylprednisolone is used in the treatment of arthritis and various respiratory diseases, as well as in the management of auto-immune diseases. The detection time is estimated with 672 hours (28 days) after intra-articular administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Methylprednisolone Acetate (Methylprednisolone)
    Besonia, Depomedrol, Esametone, Lemod, Medesone, Medixon, Medlone, Medrol Dosepak, Medrone, Mesopren, Metastab, Methylprednisolone, Metrisone, Metrocort, Metysolon, Promacortine, Reactenol, Summicort
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Methylprednisolone acetate is used in the treatment of arthritis and various respiratory diseases, as well as in the management of auto-immune diseases. The detection time is estimated with 672 hours (28 days) after intra-articular administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Methylprylon (Methyprylon)
    Dimerin, Methprylon, Noctan, Nodular
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Methylprylon (Methyprylon) is a sedative used for treating insomnia, but is now rarely used as it has been withdrawn from the markets in many countries and been replaced by newer drugs with fewer side effects, such as benzodiazepines. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methylpseudoephedrine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    A psychostimulant which also relieves nasal and mucous swelling, and is mainly used as a relief for common cold symptoms. It is a prohibited substance in sports. Not commonly used in equine medicine. Not approved for use in veterinary medicine. High possibility of affecting performance.
  • Methylsalicylic acid
    Tubasal, Nemasol Sodium
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Methylsalicylic acid may be used to relieve pain. It metabolises into salicylic acid, a Controlled Medication. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Methyltestosterone
    Android, Testred, Virilon
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An oral synthetic androgenic steroid, with some anabolic properties. It is produced and sold in many countries, including the USA. No current medical indication in horses, however it is used to treat breast cancer in women, testosterone deficiency in men, and abused for its androgenic potential in bodybuilders. Methyltestosterone has been banned by the International Olympic Committee and the Food and Drug Administration (FDA).
  • Methyltrienolone
    Metribolone
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A potent, synthetic, orally administered androgen, with no legitimate medical use. Potential for abuse, due to its anabolic properties.
  • Methyprylon (Methylprylon)
    Dimerin, Methprylon, Noctan, Nodular
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Methyprylon (Methylprylon) is a sedative used for treating insomnia, but is now rarely used as it has been withdrawn from the markets in many countries and been replaced by newer drugs with fewer side effects, such as benzodiazepines. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Methysergide
    Sansert, Deseril
    Banned
    Click to expand
    Definition: 5-hydroxytryptamine receptor antagonist
    Information:
    Methysergide is a prescription drug used for prophylaxis of migraine headaches in humans. Methysergide also produces psychedelic and hallucinogenic effects. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Meticrane
    Arresten, Fontiliz
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Not commercially available in the USA or EU. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Metipranolol
    Optipranolol, Metipranolol
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    Used in the topical treatment of glaucoma in humans. It reduces intraocular pressure. Not approved for use in veterinary medicine.
  • Metoclopramide
    Apo-Metoclop, Clopra, Clopromate, Elieten, Emperal, Enterosil, Gastrosil, Maxolon, Metoclopramide, Metopram, Paspertin, Primperan, Reglan, Viscal
    Conditionally Permitted
    Click to expand
    Definition: Dopamine antagonist
    Information:
    Metoclopramide may be used in the treatment of ileus. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Metocurine
    Metocurine Iodide, Metubine, Mutubine Iodide
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    Metocurine iodide is given by injection for muscle relaxation as a pre-anaesthetic, or during surgery. It is given by injection only. Its use in horses is prohibited by equine control bodies.
  • Metolazone
    Mykrox, Zaroxolyn
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Metolazone is generally prescribed with other antihypertensive drugs, as rapid acting highly available or slower onset less bioavailable, medicine for hypertension. Dose rates for oedema of congestive heart failure, or renal or liver failure are not separately established. Not authorised for animals; use in horses prohibited by equine control bodies.
  • Metomidate
    Aquacalm, Hypnodil, Methoxymol
    Banned
    Click to expand
    Definition: Hypnotic
    Information:
    Metomidate is used by registered veterinary practitioners for the sedation of pigs and birds in particular, especially raptor species. It is usually combined with Azaparone. Use in horses prohibited by equine control bodies.
  • Metoprolol
    Beloc, Beprolo, Betaloc, Lopresor, Lopressor, Metoprolol, Novo-Metoprol, Selokeen, Seloken
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    Metoprolol tartrate and succinate salts are prescribed for stable symptomatic heart failure due to ischaemia, hypertension or cardiomyopathy, for long-term treatment of angina pectoris, and treatment and prevention of arrhythmia. Not licensed for animals; use in horses prohibited by equine control bodies.
  • Metrenperone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Antipyretic
    Information:
    Metrenperone helps heal skin and muscle ulcers, refractory lesions of diabetes, leprosy, and ischaemia. Used off-licence in veterinary medicine for pyrexic inflammatory conditions in cattle, and navicular disease in horses. Potentially modulates repair of acutely injured collagenous (tendon) tissue; high possibility of affecting performance.
  • Metyrapone
    Mepyrapone, Metapirone, Metapyron, Metapyrone, Methopirapone, Methopyrapone, Methopyrinine, Methopyrone, Metopiron, Metopirone, Metopyrone, Metroprione
    Banned
    Click to expand
    Definition: Hydrocortisone synthesis inhibitor
    Information:
    Metyrapone is a diagnostic aid for differential diagnosis of Adrenocorticotropic hormone (ACTH) dependent Cushing's syndrome in medical and veterinary medicine and helps management of the disorder. In human patients with cirrhosis, nephrosis, and congestive heart failure, it is given with glucocorticosteroids for resistant oedema, caused by increased aldosterone secretion.
  • Mexazolam
    Melex, Sedoxil
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    Due to relatively rapid onset and development of tolerance, Mexazolam is used as a short term anxiolytic. Some drowsiness may occur. Undergoes hepatic metabolism and renal excretion. Not approved for animals. Use in horses prohibited by equine control bodies.
  • Mexiletine
    Alti-Mexiletine, Katen, Mexetil, Mexilen, Mexiletine, Mexitil, Mexitilen, Myovek, Novo-Mexiletine, Ritalmex, Tumetil
    Banned
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    Mexiletine treats rapid ventricular tachycardia and other ventricular arrhythmias in humans and dogs, especially with risk of heart block. Helps refractory pain and muscle stiffness of myotonic dystrophy. It is well absorbed, with rapid action, and has a narrow therapeutic dose range. Use in horses prohibited by equine control bodies.
  • Mianserin
    Athimil, Athymil, Bolvidon, Lantanon, Lerivon, Mianserine, Norval, Tolvin, Tolvon
    Banned
    Click to expand
    Definition: Psychoactive
    Information:
    Mianserin was widely used internationally for its antidepressant, anxiolytic, hypnotic, anti-emetic, orexigenic and antihistamine effects. Phased out following the introduction of the analogue Mirtazapine. Can cause withdrawal signs and agranulocytosis. Not approved for animal use. High potential to affect performance.
  • Mibefradil
    Mibefradil, Posicor
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    Mibefradil was prescribed for hypertension and chronic angina pectoris. It inhibits liver metabolism of certain other drugs (antihistamines, Histamel, Statin) and therefore was withdrawn from the USA market. Not approved in animals; use in horses prohibited by equine control bodies.
  • Mibolerone
    Cheque drops, Mibolerone
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Mibolerone is prescribed in veterinary medicine for oestrus suppression in bitches, and in some zoo species. It is used to treat false pregnancy, and to lengthen short oestrus cycles. Rapid effect and elimination led to abuse by athletes for increased aggression. Use in horses prohibited by equine control bodies.
  • Midazolam
    Midazolam HCl, Hypnovel ampoules, Midazolam solution
    Conditionally Permitted
    Click to expand
    Definition: Sedative
    Information:
    Midazolam may be used to reduce anxiety, as a sedative and in an anaesthetic premedication. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Midodrine
    Pro-Amiline, ProAmatine
    Banned
    Click to expand
    Definition: Vasopressor
    Information:
    Midodrone HCl is prescribed where persistent orthostatic hypotension interferes with normal living activities. Also used for dysautonomia and tachycardia. 80% of active metabolite undergoes active renal secretion. Not authorised for animals. Use in horses prohibited by equine control bodies.
  • Milrinone
    Primacor
    Banned
    Click to expand
    Definition: Phosphodiesterase 3 inhibitor
    Information:
    Milrinone lactate is given for short term treatment of severe refractory congestive heart failure, and acute heart failure in dogs caused by dilated cardiomyopathy. Assists in ischaemic disease and is rapidly excreted (90% in 8 hours, 80% unchanged) through active renal secretion. Use in horses prohibited by equine control bodies.
  • Minoxidil
    APO-Gain Topical solution, Loniten, Minoxidil, Rogaine tablets
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    Minoxidil is prescribed for severe refractory hypertension with target organ damage. It is also applied topically for androgenic alopecia. Rapid onset, half-life 4 hours, 90% metabolised. Not approved for animals. Use in horses prohibited by equine control bodies.
  • Mirtazepine
    Avanza, Remeron, Zispin Soltab
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    Mirtazepine is prescribed for episodes of major depression. It is well absorbed and rapidly effective. It is extensively metabolised, with the demethylated product equally active. It is eliminated through urine and faeces. Not approved for animals. Use in horses prohibited by equine control bodies.
  • Mivacurium
    Mivacron
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    Mivacurium chloride is used to facilitate intubation as a reversible adjunct to anaesthetic. It has a rapid onset and hydrolysis (half-life 2 minutes) to inactive metabolites; 95% recovered in 30 minutes. Not approved for use in animals. Use in horses prohibited by equine control bodies.
  • Modafanil
    Cephalon tablets, Provigil
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Modafinil restores and improves daytime alertness and wakefulness. It opposes impaired psychomotor, cognitive, and other sensorial functions associated with narcolepsy, or obstructive sleep apnoea/hypopnoea, and chronic shift work sleep disorder. Use in horses prohibited by equine control bodies.
  • Moexipril
    Cardiotensin, Femipres, Moex, Perdix, Primox
    Banned
    Click to expand
    Definition: Angiotensin-converting enzyme inhibitor
    Information:
    Moexipril HCl is effective in human and animals for relief of hypertension, and is often prescribed with thiazide diuretic. There is low bioavailability, rapid conversion to active drug, complex elimination through urine and faeces, and a mostly active compound (26% original prodrug). Use in horses prohibited by equine control bodies. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Mofebutazone
    Mofesal, Monozon, Reumatox
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Mofebutazone has been used in human and animal medicine, in particular for the relief of painful musculoskeletal conditions. Use prohibited by all sport control bodies, including equine control bodies.
  • Molidustat
    Banned
    Click to expand
    Definition: Hypoxia Inducible Factor Activator
    Information:
    A drug which increases endogenous production of erythropoetin. It has no legitimate therapeutic indication in the equine athlete.
  • Molindone
    Moban
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Molindone is prescribed specifically for the treatment of acute and chronic schizophrenia. It is rapidly absorbed and effective for 24 to 36 hours. 23% excreted unchanged in urine and faeces. Not approved for animals. Use in horses prohibited by equine control bodies.
  • Mometasone
    Asmanex Twisthaler inhalation powder, Elocon cream, Elocon ointment, Nasonex nasal spray, PMS-Mometasone, Taro-mometasone
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    Mometasone furoate is prescribed for intranasal application to treat and prevent seasonal or perennial allergic rhinitis, and nasal polyps. It is used topically to relieve inflammation and pruritis of dermatoses, and orally for maintenance treatment of persistent asthma. Use in horses is prohibited by equine control bodies.
  • Montelukast
    Brondilat, Montelast, Singulair, Singular
    Banned
    Click to expand
    Definition: Leucotriene receptor antagonist - asthma treatment
    Information:
    Montelukast sodium is prescribed for chronic asthma treatment and prophylaxis. It is used to prevent exercise induced bronchoconstriction, and to relieve the symptoms of allergic rhinitis. It is rapidly absorbed, and highly protein-bound, with biliary excretion. Use in horses prohibited by equine control bodies.
  • Moperone
    Luvatren
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Moperone chlorhydrate (HCl) has been prescribed for psychomotor excitation, chronic and acute psychosis, mental confusion, delirium, schizophrenia, vomiting, abnormal motion, and for ophthalmic application to reduce intra-ocular pressure in glaucoma. Use in horses prohibited by equine control bodies.
  • Moprolol
    Levotensin, Omeral
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    Moprolol tartrate has been used to treat cardiac arrhythmia, hypertension, angina pectoris, hyperthyroid effects, acute myocardial ischaemia, and infarction, and idiopathic dilated cardiomyopathy. It is rapidly absorbed and active, with a half-life of 3 to 4 hours. Renal excretion of inactive metabolites. High potential to affect performance.
  • Morphedrine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Morphedrine produces central nervous and cardiovascular stimulation with increased coronary and cerebral blood flow and greater skeletal muscle power. Prohibited by equine control bodies.
  • Morpheridine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Analgesic
    Information:
    Morpheridine is a strong analgesic with opiod side effects such as respiratory depression and sedation. It is not currently used in medicine.
  • Morphine
    Avinza, Duramorph, Kadian, Morphalgin, Morphine sulphate injection, MS-Contin, MST Continus, Oramorph, Roxanol, Sevredol
    Conditionally Permitted
    Click to expand
    Definition: Opioid
    Information:
    Morphine may be used to relieve pain. Morphine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Mosapramine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Mosapramine is not approved for animal treatment.
  • Moxaverine
    Certonal, Eupaverin, Eupaverine, Eupaverina, Kollateral
    Banned
    Click to expand
    Definition: Phosphodiesterase inhibition
    Information:
    Moxaverine is used to treat perfusion abnormalities of the brain, heart and extremities, and to reduce arterial spasms and ischaemia. It is used in functional disorders of the gut, bile duct and ureter to reduce spasms, and improves ocular perfusion in degenerative conditions. Significant potential to improve performance.
  • Muscarine
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Parasympathomimetic
    Information:
    Muscarine has no therapeutic indication in humans or animals. Use in horses prohibited by equine control bodies. Muscarine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance.
  • Myoinosital tripyrophosphate
    Banned
    Click to expand
    Definition: Pyrophosphate
    Information:
    A drug which increases tissue oxygenation and also known as myo-inositol trispyrophosphate (ITTP). It has no legitimate therapeutic indication in the equine athlete.
  • N-butyl Scopolamine
    Buscopan
    Conditionally Permitted
    Click to expand
    Definition: Anticholinergic
    Information:
    N-butylscopolamine may be used in the treatment of abdominal spasms such as colic. The detection time is estimated with 24 hours (1 day) after intra-venous administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Nabumetone
    Gen-Nabumetone, Relafen, Relifex tablets, Suspension
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Nabumetone is prescribed for anti-inflammatory and analgesia support in osteo-arthritis and rheumatoid arthritis. It is well distributed in inflamed tissues, and carries the risk of cardiovascular thrombosis, myocardial infarction, stroke and gut disturbance. It is not approved for use in animals. Use in horses is prohibited by equine control bodies.
  • Nadolol
    Corgard
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    Nadol was prescribed for prolonged action in treatment of stable chronic angina, tachyarrhythmias, moderate hypertension, thyrotoxicosis and for migraine prophylaxis. Absorption poor and variable, and is excreted unchanged mostly in urine. Use in horses prohibited by equine control bodies.
  • Nadoxolol
    Bradyl
    Banned
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    Nadoxolol has been prescribed for angina, cardiac arrhythmias, other cardiac conditions, and migraine prophylaxis. It is absorbed well through intra-nasal application as this avoids poor gut absorption and allows its rapid metabolism. Poisoning cases have occurred. High potential to affect performance.
  • Naepaine
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    Originally used for localised pain relief, Naepaine is applied topically for mouth ulcers and infections, and to neuromas and amputation stump neuromas (it may be injected with steroid mix). It is used for skin lesions, and in visco-elastic eye preparations for good delivery to deeper tissues for surgery. Its use in horses is prohibited by equine control bodies.
  • Naftidrofuryl
    Dusodril, Nafronyl, Praxilene
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    Naftidrofuryl helps in the management of peripheral and cerebral vascular disorders, incipient gangrene, trophic ulcers, diabetic ateriopathy, muscle cramp, and cerebral vascular insufficiency leading to mental deterioration. It has a variably rapid absorption and metabolism (half-life 1 hour). Significant potential to affect performance.
  • Nalbuphine
    Nubain
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    Nalbuphine is used for post-operative analgesia (human and animal), in human obstetrics, and higher doses supplement general anaesthesia. It is less effective in men and was discontinued in 2003. It reverses the adverse opioid effects in small animals, gives marked sedation, and has a rapid onset. Its use in horses is prohibited by equine control bodies.
  • Nalmefene
    Selincro
    Banned
    Click to expand
    Definition: Opioid antagonist
    Information:
    Nalmefene is a substance with sedative effects and used to treat substance dependency in people.
  • Nalorphine
    Nalline
    Banned
    Click to expand
    Definition: Opiod receptor agonist and antagonist
    Information:
    Nalorphine is a drug that was previously used to test opioid dependency, or to counter the effects of opioids like morphine or heroin. No legitimate therapeutic use in the equine athlete. High possibility of affecting performance.
  • Naloxone
    Naloxone HCl, Narcanti, Nexodal, Suboxone
    Conditionally Permitted
    Click to expand
    Definition: Opioid antagonist
    Information:
    Naloxone may be used to reverse the effects of opioid medication. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Naltrexone
    Naltrexon Vitaflo, Revia, Relistol, Vivitrol
    Banned
    Click to expand
    Definition: Opiod receptor antagonist
    Information:
    Naltrexone is a drug used to counter the effects of opioids like morphine or heroin, and used mainly to treat opioid or alcohold dependency. No legitimate therapeutic use in the equine athlete. High possibility of affecting performance.
  • Nandrolone (Nortestosterone)
    Deca-Durabolin, Durabolin, Laurabolin, Nandrolin
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Nandrolone (19-nortestosterone) is an anabolic steroid that may be present naturally in the body, albeit in minute quantities. Used to be a treatment of osteoporosis in postmenopausal women, and was used in the treatment of some anaemias, but it is no longer recommended. Used in veterinary medicine in katabolic disease states, for example following surgery, or in newborn animals. Rarely used in therapeutic interventions in horses. Also misused in equine athletes to enhance muscle development. High possibility of affecting performance.
  • Naphazoline
    Clearine, Coldan, Murine Eye Drops, Naphcon, Naphcon Forte, Privine, Rhino-Mex-N, Transpulmina Rino, Vasocon
    Banned
    Click to expand
    Definition: Sympathomimetic
    Information:
    It is a sympathomimetic drug that reduces blood flow, and is used to reduce swelling in mucous membranes. It is therefore used in eye drops to relieve redness and swelling. May also have systemic effects in the body (higher blood pressure, increased heart rate and reactivity).
  • Naproxen
    Apranax, Flanax, Floxalin, Madaprox, Naixan, Napren, Naprogesic, Naprosyn, Novo-Naprox, Synflex, Xenar
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Naproxen may be used to relieve pain, inflammation and control fever. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Naratriptan
    Amerge, Naramig
    Banned
    Click to expand
    Definition: 5-hydroxytryptamine agonist (migraine treatment)
    Information:
    Naratriptan is used for the treatment of acute migraine attacks in humans. Side effects include dizziness, drowsiness, tingling of the hands or feet, unusual tiredness, nausea, dry mouth and unsteadiness. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete.
  • Nebivolol
    Bystolic, Nebilet, Hypoloc, Nebivolol
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    Nebivolol lowers blood pressure by dilating vasculature, and by increasing cardiac output. It is used in humans patients with hypertension or heart disease. Betablockers may cause the side effects of slow heartbeat and depression and may have potential to modify behaviour. Not registered for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. Moderate possibility of affecting performance.
  • Nedocromil
    Alocril, Tilade
    Banned
    Click to expand
    Definition: Mast cell stabiliser
    Information:
    Nedocromil is used for controlling symptoms in asthmatic and allergic patients. It is used as an inhaler product for breathing symptoms, and as an ophthalmic solution for eyes. Not approved for use in veterinary medicine, but it has occasionally been used in dogs and cats with asthma, and in horses with heaves as a maintenance therapy, although the benefits of this treatment option remain unclear.
  • Nefazodone
    Serzone, Nefadar
    Banned
    Click to expand
    Definition: Psychoactive
    Information:
    Nefazodone is a psychoactive drug (serotonin re-uptake inhibitor) used in the treatment of depression in humans. Its sale has been discontinued in many countries, like the USA, and many European countries. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. High possibility of affecting performance.
  • Nefopam
    Acupan
    Banned
    Click to expand
    Definition: Non opiod analgesic
    Information:
    Nefopam is a centrally acting non-opioid analgesic drug that is used for treating moderate to severe pain alone, or in conjunction with opioid pain relief. May cause drowsiness and blurred vision as side effects. Not approved for use in veterinary medicine. No reported medical use in equines. Potential to influence performance is high.
  • Neostigmine
    Neostigmin, Glycostigmin
    Conditionally Permitted
    Click to expand
    Definition: Parasympathomimetic
    Information:
    Neostigmine may be used in the treatment of gastrointestinal tract diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Neridronate
    Banned
    Click to expand
    Definition: Bone metabolism agent
    Information:
    A bisphosphonate drug used for the treatment of Pagets disease. It is considered a risk to equine welfare and has no legitimate therapeutic indication in the equine athlete
  • Nialamide
    Niamid, Espril
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    An antidepressant of the mono-amine oxidase inhibitor class, that is no longer available in the EU or the USA. It is used to treat depressive disorders in humans. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is moderate.
  • Nicardipine
    Cardene
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    A calcium blocker that is used to treat hypertension patients, angina pectoris and vascular spasms in humans. Not approved, and not normally used, in equine veterinary medicine.
  • Nicotine
    Nicorette, Habitrol, Nicorol, Nicotinell
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Used in old insecticides, but used medicinally in smoking cessation. The substance acts as a stimulant and relaxant in mammals, and is the main factor responsible for the dependency forming properties of tobacco smoking. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Nicoumalone
    Sintrom, Sinthrome
    Banned
    Click to expand
    Definition: Anticoagulant
    Information:
    Not commercially available for medicinal use in the USA or EU. Anticoagulants prevent harmful clots from forming in the blood vessels, for example, in stroke patients, or in individuals with vein thrombosis or pulmonary embolism. It is sometimes used in the treatment of horses with general infection related blood clotting, although that treatment is controversial. The more usual exposure of horses to this class of substances (dicoumarol derivatives) is through ingestion of rodenticides or moldy sweetclover.
  • Nifedipine
    Adalat, Nical, Nifedipin, Procardia
    Banned
    Click to expand
    Definition: Anti-angina
    Information:
    A calcium blocker used to treat hypertension patients, angina pectoris and vascular spasms in humans. Not approved for use in veterinary medicine.
  • Nifenalol
    Impeasel, Inpea
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    Nifenalol is a beta-adrenergic antagonist (beta blocker) not commercially available for medical use. Beta-blockers may cause slow heartbeat and depression as side effects, and may have potential to modify behaviour. Not registered for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. Moderate possibility of affecting performance.
  • Niflumic acid
    Nifluril
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    A non-steroidal painkiller used to treat muscle and joint pain, for example, in rheumatoid arthritis. Not commercially available for medical use in the USA or EU. Not approved for use in veterinary medicine.
  • Nikethamide
    Cardiamine, Cora, Coramina, Coramine, Corazone, Cormed, Kardonyl, Percoral
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    A stimulant with a strong effect on the respiratory system. It was previously used in tracheal intubation of surgery patients, but no longer has any medicinal use. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Nimesulide
    Nimovet, Nimed, Sulidene
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    A painkiller and antipyretic drug used in humans and in veterinary medicine. Not available in some European countries, USA or Singapore. Use in horses is contraindicated.
  • Nimetazepam
    Erimin
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is a hypnotic, anxiolytic and sedative drug, which is also commonly used by drug abusers. Not commercially available for medicinal use in the EU or USA, but it is in Japan. As a benzodiazepine derivative, it could be used as a sedative, and to induce anaesthesia in horses, but it is not common. High possibility of affecting performance.
  • Nimodipine
    Nimodipine, Nimotop
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    A calcium blocker used to treat hypertension patients, and cerebral bleeding (vasospasms) in humans. Not approved for use in veterinary medicine.
  • Nitrazepam
    Insomin, Dormalon, Nitravet, Mogadon
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is benzodiazepine class hypnotic drug with sedative, anxiolytic, anticonvulsant and skeletal muscle relaxant properties. Not approved for use in veterinary medicine. Only available commercially for oral administration, so although possible, its use in equine sedation and anaesthesia is very unlikely. High possibility of affecting performance.
  • Nitroglycerin
    Nitroglycerin, Nitromist, Nitrostat, Minitran
    Conditionally Permitted
    Click to expand
    Definition: Vasodilator
    Information:
    Nitroglycerin may be used in the treatment of laminitis. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Nomifensine
    Alival, Nomival
    Banned
    Click to expand
    Definition: Dopamine re-uptake inhibitor
    Information:
    No longer commercially available for medical use due to side effects. It was used as an antidepressive, but also causes agitation through stimulation of the central nervous system. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Nonivamide
    ABC Hydrogel-Warmepflaster, ABC Warme-Pflaster Sensitive, Gothaplast Capsicum-Warmepflaster, Hansaplast ABC Warme-Pflaster Sensitive
    Banned
    Click to expand
    Definition: Topical analgesic/irritant
    Information:
    Present in chilli peppers, but commonly manufactured synthetically. Nonivamide is used as a food additive in seasonings, flavourings, and spice blends. It is also used in confectionery industry to create hot sensation, in cosmetic products, and in the pharmaceutical industry in some formulations. Equines may be exposed to this substance through skin ointments. May be used to sensitize the skin. No therapeutic indication in the equine athlete. Potential to influence performance is moderate.
  • Norandrostenediol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An anabolic testosterone precursor, it has been used by bodybuilders and athletes to provide the anabolic benefits of taking an anabolic steroid, without the legal risks. Nowadays, however, it also classified as an illegal drug, for example in the USA. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Norandrostenedione
    19-N-Andro, Bolandione, Proven Pure 19-Norandrostenedione
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A prohormone that converts to nandrolone, it has been used by bodybuilders and athletes to provide the anabolic benefits of taking an anabolic steroid, without the legal risks, but is now classified as an illegal drug, for example in the USA. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Norbolethone
    Genabol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An anabolic steroid that is not commercially available for medicinal use. Has been misused by human athletes. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Norclostebol
    Anabol 4-19
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An illegal anabolic steroid that was identified on the European black market in the late 1990s and possibly used in the breeding of cattle. Not available commercially, or for medicinal use. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Norcocaine
    Banned
    Click to expand
    Definition: Cocaine metabolite
    Information:
    It is the pharmacologically active metabolite of cocaine, which is a stimulant of the central nervous system. Not in medical use. It is researched for its effects as a local anaesthetic. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Nordiazepam
    Stilny, Vegesan, Calmday
    Banned
    Click to expand
    Definition: Tranquiliser
    Information:
    A benzodiazepam class drug used in the relief of anxiety. Not commercially available for medical use, for example in the USA or EU. Could be used in the sedation of horses, but is not common practice.
  • Norepinephrine (noradrenaline)
    Conditionally Permitted
    Click to expand
    Definition: Hormone
    Information:
    Norepinephrine (noradrenaline) may be used in the treatment of anaphylaxis and hypotension. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Norethandrolone
    Nilevar
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Norethandrolone is a derivative of nandrolone. Not in medicinal use. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Norfenefrine
    Energona, Esbuphon, Molycor-R, Nevadral, Norenol, Normetol, Novadral, Stagural, Vingsal, Zondel
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    A cardiac sympathomimetic stimulant no longer used in medicine. Increases blood pressure and heart rate. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Norfenfluramine
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Norfenfluramine is a psychoactive drug that also has effects on the vasculature. No medicinal use. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Norfluoxetine
    Banned
    Click to expand
    Definition: Fluoxetine metabolite
    Information:
    Fluoxetine is used in the treatment of severe depression in humans. Norfluoxetine is its active metabolite. Like fluoxetine, norfluoxetine functions as a serotonin re-uptake inhibitor (SRI). No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Normethandrolone
    Orga-Steron
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Normethandrolone is a derivative of nandrolone. Not in medicinal use. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Norpseudoephedrine (Cathine)
    Adiposetten, Amorphan, Appetrol, Dietene, Miniscap, Minusin Depot, Mirapront N, Neo-Soldana, Nobese, Reduform, Thinz
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Norpseudoephedrine is an adrenaline releasing drug with psychoactive properties. It is classified as an illegal drug in many countries. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Nortestosterone (Nandrolone)
    See Nandrolone
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    See Nandrolone
  • Nortriptyline
    Nortriptyline Hydrochloride, Aventyl, Pamelor, Noritren
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    A tricyclic antidepressant used in the treatment of major depression, and occasionally used also for chronic illnesses such as chronic fatigue syndrome, chronic pain and migraines, and in some neurological conditions in humans. Not approved for use in veterinary medicine. No legitimate therapeutic indication in the equine athlete. Potential to influence performance is high.
  • Noscapine
    Anarcotine, Narcotine, Nectodon, Nospen
    Banned
    Click to expand
    Definition: Antitussive
    Information:
    It is used as a cough suppressant.
  • Nylidrin (Buphenine)
    Arlibide, Arlidin, Diatolil, Dilatol, Dilydrin, Dilydrine Retard, Opino, Penitardon, Perdilatal Forte, Tocodilydrin, Tocodrine
    Banned
    Click to expand
    Definition: Sympathomimetic
    Information:
    Sympathomimetic and beta adrenergic agonist. It causes peripheral vasodilation and has a positive ionotropic effect. It may affect performance.
  • Octadecafluoronaphthalene (Perfluorodecalin)
    Banned
    Click to expand
    Definition: Artificial gas carriers in blood
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Octopamine
    Norden, Norfen, Norphen
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Used as a slimming aid in humans, as it may encourage mobilisation of fat.
  • Olanzapine
    Olzapin, Rexapin, Zyprexa, Zyprexa, Zydis, Zalasta, Zolafren
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used for the treatment of schizophrenia and bipolar disorders.
  • Olmesartan
    Benicar, Olmetec, Votum
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    Used to treat high blood pressure in humans by causing vasodilation. Also used to treat sarcoidosis in humans.
  • Olodaterol
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Olodaterol may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Olpadronate
    Banned
    Click to expand
    Definition: Bone metabolism agent
    Information:
    A bisphosphonate drug considered a risk to equine welfare and has no legitimate therapeutic indication in the equine athlete.
  • Olsalazine
    Dipentum
    Banned
    Click to expand
    Definition: Gut anti-inflammatory
    Information:
    Used in the treatment of inflammatory bowel disease such as ulcerative colitis.
  • Omeprazole
    Gastroguard
    Permitted
    Click to expand
    Information:
    The maximum permitted plasma concentration of Omeprazole is 10 nanograms per milliliter. When omeprazole is administered, the dose should be accurately calculated according to the weight of the horse. The contents of one syringe will dose a 1250 lb (568 kg) horse at the rate of 1.8 mg omeprazole/lb body weight (4 mg/kg). For the treatment of gastric ulcers, each weight marking on the syringe plunger will deliver sufficient omeprazole to treat 250 lb (114 kg) body weight. For prevention of recurrence of gastric ulcers, each weight marking will deliver sufficient omeprazole to dose 500 lb (227 kg) body weight. To deliver the treatment at a dose rate of 1.8 mg omeprazole/lb body weight (4 mg/kg), set the syringe plunger to the appropriate weight marking according to the horse's weight in pounds. To deliver at the dose rate of 0.9 mg/lb (2 mg/kg) to prevent recurrence of ulcers, set the syringe plunger to the weight marking corresponding to half of the horse's weight in pounds. Doses should be given 24 hours apart. No part of a dose should be administered during the 4 hours prior to competing.
  • Opiates (class of drugs)
    Conditionally Permitted
    Click to expand
    Information:
    Some drugs in this classification are considered prohibited and therefore NOT accepted with a Medications Report Form.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Opipramol
    Ensidon, Insidon, Oprimol, Pramolan
    Banned
    Click to expand
    Definition: Psychoactive
    Information:
    Opipramol is used in human medicine for the treatment of generalized anxiety disorder (GAD).
  • Opromazine
    Banned
    Click to expand
    Definition: Antipsychotics
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Orciprenaline
    Alotec, Alupent, Metaprel, Metaproterenol, Novasmasol
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    Used in the treament of asthma in humans.
  • Oripavine
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    Not used clinically, as it has a very narrow therapeutic margin and high toxicity. It is addictive, but less so than morphine. Oripavine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance.
  • Orphenadrine
    Banflex, Biorphen, Brocasipal, Disipal, Flexon, Mephenamin, Norflex
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    Used to potentiate effects of other analgesics for pain relief. Used for relieving muscle spasms in conditions such as lumbago and sciatica. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Osterine
    Enobosarm
    Banned
    Click to expand
    Definition: Selective Androgen Receptor Modulator (SARM)
    Information:
    Osterine is a selective androgen receptor agonist. The substance causes similar effects to anabolic steroids, resulting in muscle growth and increased muscle mass. Osterine was initially developed to treat muscle-wasting diseases.
  • Oxabolone
    Steranabol Depot, Steranabol Ritardo
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    It is used for muscle growth; it can cause an exageration of male characteristics.
  • Oxaflumazine
    Banned
    Click to expand
    Definition: Psychosedative
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Oxandrolone
    Oxandrin
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Used for promoting muscle mass in conditions of weight loss, such as patients with HIV, Turner's syndrome and alcohol induced hepatitis. It has been abused by body builders, making it a schedule III drug.
  • Oxaprozin
    Daypro, Duraprox
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Used in humans to treat osteoarthritis and osteoporosis.
  • Oxazepam
    Alepam, Medopam, Murelax, Noripam, Ox-Pam, Purata, Serax, Serepax
    Conditionally Permitted
    Click to expand
    Definition: Sedative
    Information:
    Oxazepam may be used to reduce anxiety and as a sedative. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Oxazolam
    Convertal, Hializan, Serenal, Tranquit
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used for the treatment of anxiety. Not routinely used in horses.
  • Oxcarbazepine
    Oxaleptal, Trileptal
    Banned
    Click to expand
    Definition: Anticonvulsant
    Information:
    Used in humans with epilepsy, and for mood stabilising and benign motor tics.
  • Oxethazaine
    Intracoat
    Banned
    Click to expand
    Definition: Topical anaesthetic
    Information:
    Used in treatment of humans with heartburn, and duodenal and gastric ulceration.
  • Oxilofrine (Hydroxyephedrine)
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Oxolamine
    Bredon, Oxolev, Tussibron
    Banned
    Click to expand
    Definition: Antitussive
    Information:
    It is used as a cough treatment.
  • Oxprenolol
    Captol, Corbeton, Coretal, Laracor, Slow-Pren, Slow-Trasicor, Tevacor, Trasacor, Trasicor, Trasitensin, Trasidex
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    It is used for the treatment of angina pectoris and abnormal heart rhythms. It is also used for treating high blood pressure.
  • Oxybuprocaine
    Novesin, Novesine
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    It is used in ophthalmology and otolaryngology in human medicine.
  • Oxycodone
    Endocet, Endodan, OxyContin, OxyIR, Percocet, Percodan, Roxicodone, Roxicet, Roxiprin, Tylox
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    Used for pain relief in humans in a form which is taken orally.
  • Oxyguno
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A synthetic anabolic steroid with no legitimate therapeutic indication in the equine athlete.
  • Oxymesterone
    Anamidol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Used in human medicine to replace testosterone and treat rare forms of aplastic anaemia. Misused by body builders.
  • Oxymetazoline
    Afrin, Dristan, Mucinex Full Force, Vicks Sinex
    Banned
    Click to expand
    Definition: Topical decongestant
    Information:
    It is used as a topical decongestant. It is also used to treat epistaxis (nose bleeds), and eye redness caused by minor irritation.
  • Oxymetholone
    Adroyd, Anadrol, Anadroyd, Anapolon, Anasteron, Anasteronal, Nastenon, Pardroyd, Plenastril, Synasteron, Zenalosyn
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    It is used for the treatment of anaemias.
  • Oxymorphone
    Numorphan, Nucodan, Opana
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    Used for pain relief in humans.
  • Oxypertine
    Banned
    Click to expand
    Definition: Neuroleptic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Oxyphenbutazone
    Butafen, Californit, Phlogont, Tandearil, Tanderil
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Oxyphenbutazone may be used to relieve pain, inflammation and control fever. It is a metabolite of phenylbutazone, a Controlled Medication. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Oxyphencyclimine
    Daricon
    Banned
    Click to expand
    Definition: Antimuscarinic
    Information:
    Used for treatment of peptic ulcers in humans.
  • Oxyphenonium
    Antrenyl, Argicillin, Endiform, DCF Oxyphenonium, Spastrex
    Banned
    Click to expand
    Definition: Antimuscarinic
    Information:
    Used for treatment of peptic ulcers in humans and to relieve visceral spasms.
  • Oxytocin
    Conditionally Permitted
    Click to expand
    Definition: Hormone
    Information:
    Oxytocin may stimulate uterine contractions and lactation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Paliperidone
    Invega Sustenna
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Used for the treatment of schizophrenia in humans.
  • Palmitoylethanolamid (PEA)
    Conditionally Permitted
    Click to expand
    Definition: Analgesic
    Information:
    Palmitoylethanolamid (PEA) may be used to relieve pain and inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Pamidronate
    Aredia, Pamimed
    Banned
    Click to expand
    Definition: Bone metabolism agent
    Information:
    A bisphosphonate drug used for the treatment of osteoporosis. It is considered a risk to equine welfare and has no legitimate therapeutic indication in the equine athlete.
  • Pancuronium
    Bemicin, Bromurex, Curon-B, Minopres, Panconium, Pancuron, Pancuronium, Parulon, Pavulon, Pavulone, Plumger
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    One of the drugs administered in the USA in the lethal injection.
  • Papaverine
    Artegodan, Ceraspan, Opdensit, Optenyl, Pameion, Panergon, Pavacap, Pavacen, Pavakey, Pavatym, Paveron, Qua Bid
    Banned
    Click to expand
    Definition: Opiate - muscle spasm treatment
    Information:
    Used in the treatment of visceral spasms and vasospasms (involving the heart and brain) in humans. It is occasionally used in the treatment of erectile dysfunction in humans. Papaverine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance.
  • Paracetamol (Acetaminophen)
    Anacin, Panadol, Paracetamol, Tempra, Tylenol
    Conditionally Permitted
    Click to expand
    Definition: Analgesic
    Information:
    Paracetamol (Acetaminophen) may be used to relieve pain and control fever. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Paraldehyde
    Paral
    Banned
    Click to expand
    Definition: Anticonvulsant
    Information:
    Used to treat status epilepticus in humans, and was used on psychiatric wards to induce sleep in patients suffering from delirium tremens.
  • Paramethadione
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Caused birth defects in humans in case where mothers had taken the drug as an anticonvulsant during pregnancy.
  • Paramethasone
    Cortidene, Depodillar, Dillar, Haldrone, Metilar, Monocortin, Paramezone, Triniol
    Banned
    Click to expand
    Definition: Corticosteroid
    Information:
    Used as an anti-inflammatory. Not used routinely in equids.
  • Paraxanthine
    Conditionally Permitted
    Click to expand
    Definition: Stimulant
    Information:
    Paraxanthine may simulate the central nervous system and is a metabolite of caffeine, a Controlled Medication. Paraxanthine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Pargyline
    Eudatin, Eutonyl, Eutonyl-Ten, Supirdyl
    Banned
    Click to expand
    Definition: Mono-amine oxidase inhibitor
    Information:
    It is used for the treatment of hypertension.
  • Paroxetine
    Aropax, Aroxat, Cebrilin, Deroxat, Eutimil, Paroxetine, Seroxat
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    It is used for the treatment of depression and panic attacks.
  • Pemoline
    Cylert, Deltamine, Dynalert, Hyton ASA, Kethamed, Pemoline, Ronyl, Sigmadyn, Stimul, Tradon, Volital
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used for the treatment of hyperkinetic states in children.
  • Pempidine
    Perolysen
    Banned
    Click to expand
    Definition: Ganglionic blocker
    Information:
    It is used for the treatment of severe and malignant hypertension.
  • Penbutolol
    Betapresin, Betapressin, Blocotin, Ipobar, Levatol, Lobeta
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    It is used for the treatment of hypertension and cardiac disorders.
  • Penfluridol
    Cyperon, Flupidol, Semap
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used for the treatment of schizophrenia and similar psychotic disorders.
  • Pentaerythritol Tetranitrate
    Antime, Cardiacap, cordilate, Dilcoran, Duotrate, Lentrat, Metranil, Mycardol, Mycartal, Niscodil, Nitrodex, Nitropent, Penritol, Pentafin, Pentanitrine, Pentral, Pentrit, Pentryate, Peritrate, Petrin, Quintrate
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    It is used for the treatment of angina pectoris.
  • Pentazocine
    Fortral, Fortwin, Liticon, Pentafen, Pentalgina, Pentawin
    Banned
    Click to expand
    Definition: Narcotic
    Information:
    It is used for the treatment of moderate to severe pain.
  • Pentetrazol
    Cardiazol, Cardiorapide, Metrazol
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Pentifylline
    Cosadon, Cosaldon
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Pentobarbital
    Embutal, Nembutal, Neodorm, Pentobarbital, Pentone, Sagatal, Sopental
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It is used in the premedication treatment in anaesthetic procedures.
  • Pentoxifylline
    Azutretat, Claudicat, Durapental, Hemovas, Pento-Puren, Rentylin, Tarontal, Terental, Torental, Trental
    Conditionally Permitted
    Click to expand
    Definition: Vasoprotective
    Information:
    Pentoxifylline may be used in the treatment of vascular diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Pentoxyverine (Carbetapentane)
    Atussil, Germapect, Sedotussin, Toclase, Tussa-Tablinen
    Banned
    Click to expand
    Definition: Antitussive
    Information:
    It is used for the treatment of coughs.
  • Pentylenetetrazole (Leptazole)
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Perfluorocarbons
    Banned
    Click to expand
    Definition: Artificial gas carriers in blood
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Perfluorodecalin (Octadecafluoronaphthalene)
    Banned
    Click to expand
    Definition: Artificial gas carriers in blood
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Perfluorooctylbromide
    Banned
    Click to expand
    Definition: Artificial gas carriers in blood
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Perfluorotripropylamine
    Banned
    Click to expand
    Definition: Artificial gas carriers in blood
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Pergolide Mesylate
    Aroltex, Breator, Celance, Geranil, Nopar, Parkotil, Parlide, Pergolide, Permax, Pharken, Prascend
    Conditionally Permitted
    Click to expand
    Definition: Dopamine agonist
    Information:
    Pergolide may be used in the treatment of Pituitary Pars Intermedia dysfunction (PPID), commonly known as Equine Cushings disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Periciazine (Pericyazine)
    Aolept, Nemactil, Neulactil, Neuleptil
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used for the treatment of psychoses.
  • Pericyazine (Periciazine)
    Aolept, Nemactil, Neulactil, Neuleptil
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used for the treatment of psychoses.
  • Perindoprilat
    Banned
    Click to expand
    Definition: Angiotensin-converting enzyme inhibitor
    Information:
    This is a substance deemed to have no legitimate use in equine medicine. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Perinodopril
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Perlapine
    Hypnodin
    Banned
    Click to expand
    Definition: Hypnotic
    Information:
    It is used for the short term management of insomnia.
  • Perphenazine
    Decentan, Fentazin, Perfenil, Phenazine, Trilafon, Trilifan
    Banned
    Click to expand
    Definition: Tranquiliser/phenothiazine derivative
    Information:
    It is used for the treatment of psychosis, and the management of nausea and vomiting.
  • Pethidine (Meperidine)
    Centralgine, Demarol, Demerol, Dispadol, Dolantin, Dolcontral, Dolosal, Lidol, Lydol, Meperidol, Nemerol, Petantin, Pethanol, Pethidine, Petydyna, Piperosal, Piridosal
    Banned
    Click to expand
    Definition: Narcotic
    Information:
    It is used for the treatment of moderate to severe pain.
  • Phenacemide
    Epiclase, Phenurone, Phetylureum
    Banned
    Click to expand
    Definition: Anticonvulsant
    Information:
    It is used for the treatment of epilepsy.
  • Phenacetin (Acetophenetidin)
    Codempiral, Commotional, Contradouleur, Emprazil, P-A-C Compound, Paramette, Phenaphen Plus, Stellacyl, Thephorin A-C
    Banned
    Click to expand
    Definition: Analgesic
    Information:
    It has analgesic and antipyretic properties.
  • Phenaglycodol
    Ultran-Lilly
    Banned
    Click to expand
    Definition: Tranquiliser
    Information:
    It is used for the treatment of anxiety.
  • Phenazocine
    Narphen, Prinadol
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It is used for the treatment of mild to moderate pain.
  • Phenazone
    Aurafair Otic, Auralgicin, Auraltone, Sedaural, Tympagesic
    Banned
    Click to expand
    Definition: Analgesic
    Information:
    It has analgesic and antipyretic properties.
  • Phenazopyridine
    Azodine, Phenazo, Pyridacil, Pyridium, Pyronium, Urogesic, Uropyrine
    Banned
    Click to expand
    Definition: Analgesic
    Information:
    It is used for the relief of pain associated with disorders and injuries in the urinary tract.
  • Phencyclidine
    Banned
    Click to expand
    Definition: Anaesthetic
    Information:
    It was formerly used in veterinary medicine as an immobiliser, and is widely abused in some countries as an hallucinogenic drug of abuse.
  • Phendimetrazine
    Adipost, Anorex, Antapentan, Bacarate, Bontril, Hyrex-105, Melfiat, Obesan-X, Phenazine, Plegine, PT-105
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used for the short term treatment of moderate to severe obesity and as an anorectic.
  • Phenelzine
    Nardelzine, Nardil, Phenalzine, Phenelezine, Stinerval
    Banned
    Click to expand
    Definition: Psychoactive
    Information:
    It is used for the treatment of depression.
  • Phenethylline (Fenethylline, Fenetylline, Phenetylline)
    Biocapton, Captagon, Fitton
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used for the treatment of hyperactive children and narcolepsy.
  • Phenetylline(Fenethylline, Fenetylline, Phenethylline)
    Biocapton, Captagon, Fitton
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used for the treatment of hyperactive children and narcolepsy.
  • Phenibut
    Focus Calm Horse Supplement
    Banned
    Click to expand
    Definition: Central Nervous System depressant
    Information:
    Phenibut (β-phenyl gamma aminobutyric acid) is a derivative of GABA.
  • Phenindamine
    Nolahist, Thephorin
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    It is used for the treatment of common colds and allergies. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Phenindione
    Danilone, Dindevan, Emandione, Pindione
    Banned
    Click to expand
    Definition: Anticoagulant
    Information:
    It has similar uses and properties to those of Warfarin.
  • Pheniramine
    Aviletten, Inhiston, Fenamine, Metron, Pyriton, Tripoton
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Pheniramine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Phenmetrazine
    Preludin
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It was used as an appetite suppressant, but has been withdrawn from the market.
  • Phenobarbital
    Aphenylbarbit, Aphenyletten, Comizial, Fenemal, Gardenale, Lethyl, Lumen, Luminaletten, Phenobarbitone, Sedofen, Solfoton
    Banned
    Click to expand
    Definition: Sedative
    Information:
    It is used in the treatment of epilepsy to control tonic-clonic and partial seizures.
  • Phenoxybenzamine
    Dibenyline, Dibenzyline, Dibenzyran
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    It is used in the treatment of hypertension.
  • Phenprocoumon
    Liquamar, Marcoumar, Marcumar, Marcuphen, Phenpro
    Banned
    Click to expand
    Definition: Anticoagulant
    Information:
    It is used for the treatment and prophylaxis of thromboembolic disorders.
  • Phenpromethamine
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Phensuximide
    Milontin, Succitimal
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    It is used for the treatment of epilepsy.
  • Phentermine
    Adipex, Duromine, Fastin, Lonamin, Minobese, Omnibex, Panbesy, Phentermine, Phentermyl, Teramine
    Banned
    Click to expand
    Definition: Anticonvulsant
    Information:
    Used as an anorectic for the short term treatment of moderate to severe obesity.
  • Phentolamine
    Dibasin, Regitipe, Rigitine, Vasomax
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    It is used for the prevention of paroxysmal hypertension, and as a prophylaxis against catecholamine induced hypertensive crisis during surgery.
  • Phenylbutazone
    Alqoverin, Artrizin, Artropan, Azolid, Butacote, Butadion, Butagesic, Butalgina, Butaphen, Butapirazol, Butartril, Butazolidin, Butazone, Bute, Butoz, Butrex, Diossidone, Equipalazone, Fenilbutina, Inflazone, Intrabutazone, Malgesic, Promifen, Phenylarthrite.
    Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Phenylbutazone may be used to relieve pain, inflammation and control fever. The detection time is estimated with 168 hours (7 days) for all types of administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Phenylephrine
    Analux, Fenox, Isopto Frin, Minims Phenylephrine Hydrochloride, Mydfrin, Neo-Synephrine, Nostril, Prefrin, Visadron, Vistosan
    Conditionally Permitted
    Click to expand
    Definition: Stimulant
    Information:
    Phenylephrine may be used in the treatment of hypotension and some causes of colic. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Phenyliprazine
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Phenylpiracetam (Carphedon)
    Phenotropil
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It increases physical stamina and provides improved tolerance to cold.
  • Phenylpropanolamine
    Acutrim, Control, Dexatrim, Fugoa N, Kontexin, Monydrin, Procol, Propadrine, Propagest, Rhindecon, Rinexin
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used as treatment for the common cold and cough, and as an appetite suppressant. In veterinary medicine, it is used to control urinary incontinence in dogs.
  • Phenyltoloxamine
    Antin, Bistrimin, Bristamin, Histionex
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    In combination with codeine, it is frequently used as a cough suppressant. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Phenytoin
    Antisacer, Citrullamon, Dantoine, Difhydan, Dilantin, Dintoina, Diphantoine, Epanutin, Epilantine, Labopal, Lehydan, Pyoredol, Solantyl, Toin Unicelles
    Conditionally Permitted
    Click to expand
    Definition: Anticonvulsant
    Information:
    Phenytoin may be used in the treatment of abnormal heart rhythms and muscle spasms. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Pholcodine
    Actuss, Adaphol, Codisol, Dia-Tuss, Duro-Tuss, Galenphol, Homocodeine, Lantuss, Pavacol-D, Pholcolin, Tussinol, Tussokon, Tuxi
    Banned
    Click to expand
    Definition: Antitussive
    Information:
    It is used as a cough suppressant.
  • Pholedrine
    Epifen, Isodrin, Isodrine, Isodrinum, Paredrinol, Pholetone, Promethin, Prometin, Pulsotyl, Stimatone, Sympropamin, Syncordan, Terapinyl, Varitol, Veritain, Veritol
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used for the treatment of shock and toxemia.
  • Physostigmine
    Calabarine, Cogmine Eserine, Erserine, Eserine, Esromiotin, Ezerin, Isopto Eserine, Physostigmine 9599, Physostol
    Conditionally Permitted
    Click to expand
    Definition: Parasympathomimetic
    Information:
    Physostigmine may be used in the treatment of opthalmic disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Picrotoxin
    Cocculin
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used for the relief of respiratory distress and as an antidote to poisoning by central nervous system (CNS) depressants.
  • Piminodine
    Alvodine
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It was used as an analgesic and sedative, but is no longer in clinical use.
  • Pimozide
    Opiran, Orap, Orap Forte, Pizide
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used in the management of the Gilles de la Tourette's syndrome.
  • Pinazepam
    Domar, Duna
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    It is used for the treatment of anxiety and sleep disturbances.
  • Pindolol
    Barbloc, Betadren, Carvisken, Decreten, Durapindol, Hexapindol, Pectobloc, Pinbetol, Viskeen, Visken
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    It is used for the treatment of angina pectoris, hypertension arrhythmias and prophylaxis of acute stress reactions.
  • Pioglitazone
    Actos
    Conditionally Permitted
    Click to expand
    Definition: Anti-hyperglycaemic
    Information:
    Pioglitazone may be used in the treatment of equine metabolic syndrome. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Pipamazine
    Banned
    Click to expand
    Definition: Anti-emetic/mild tranquiliser
    Information:
    It is used as an anti-emetic in the morning.
  • Pipamperone
    Dipiperone, Propitan
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used for the treatment of psychoses.
  • Pipecuronium
    Aperomid, Arduan, Arpilon
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    It is used during surgical procedures and anaesthesia as a muscle relaxant.
  • Pipenzolate
    Expal, Piper, Piptal, Pipzen
    Banned
    Click to expand
    Definition: Antimuscarinic
    Information:
    It is used for the treatment of peptic ulcers and for the relief of visceral spasms.
  • Pipequaline
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    Pipequaline is an anxiolytic under investigation.
  • Piper Methysticum
    Kava
    Banned
    Click to expand
    Definition: Anti-psychotic
    Information:
    Human anti-psychotic drug with high potential for abuse. Used in humans to treat stress, anxiety and insomnia.
  • Piperacetazine
    Psymod, Quide
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Uses similar to those of Chlorpromazine.
  • Piperidione
    Ascron, Sedilan, Sedulon, Tusseval
    Banned
    Click to expand
    Definition: Anticholinergic
    Information:
    It is a cough suppressant with anticholinergic properties.
  • Piperidolate
    Dactil, Crapinon, Edelel
    Banned
    Click to expand
    Definition: Anticholinergic
    Information:
    It is given in the treatment of visceral spasms.
  • Piperocaine
    Metycaine Hydrochloride
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    It is used for infiltration anaesthesia, surface anaesthesia, and regional nerve block.
  • Piperoxan
    Banned
    Click to expand
    Definition: Adrenergic blocker
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Pipotiazine
    Lonseren, Piportil, Piportyl
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used for the treatment of psychoses.
  • Pipradol (Pipradrol)
    Meretran
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used for the treatment of obesity, narcolepsy, and the symptoms of senile dementia.
  • Piquindone
    Trade names are not currently listed on this site.
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Piracetam
    Avigilen, Cerebroforte, Cerebropan, Cerebrosteril, Cetam, Ciclofalina, Cuxabrain, Durapitrop, Encetrop, Memo-Puren, Noostan, Nootrop, Nootropil, Normabrain, Norzetam, Pirroxil, Psycoton
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    It is used following surgery or trauma, and in a variety of disorders such as alcoholism, vertigo, senile dementia, cerebrovascular accidents, and behavioural disorders in children.
  • Pirbuterol
    Exirel, Maxair, Maxair Autohaler, Spirolair, Zeisin
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Pirbuterol may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Piretanide
    Arelix, Diumax, Tauliz
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    It is used for the treatment of hypertension.
  • Piroxicam
    Antiflog, Artroxicam, Baxo, Dexicam, Doblexan, Felden, Feldene, Flogobene, Improntal, Lampoflex, Larapam, Nirox, Novo-Pirocam, Piroftal, Polipirox, Reudene, Roxene, Roxiden, Sasulen, Vitaxicam, Zacam
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Piroxicam acid may be used to relieve pain and inflammation and treat certain cancers. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Pirprofen
    Rangasil, Rengasi, Rengasil
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used for the treatment of rheumatic disorders.
  • Pitcher Plant extract
    Sarapin
    Conditionally Permitted
    Click to expand
    Definition: Analgesic
    Information:
    Pitcher plant extract may be used to relieve pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Pizotifen
    Mosegor, Sandomigran, Sandomigrin, Sanmigran
    Banned
    Click to expand
    Definition: Antimigraine
    Information:
    It is used for the prophylaxis of vascular headaches, including migraine.
  • Polythiazide
    Drenusil, Minizide, Nephril, Polypress, Renese
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    It is used for the treatment of oedema and hypertension.
  • Potassium Bromide
    Dibro-Be mono, Epilease, Bromapex, Epibrom
    Conditionally Permitted
    Click to expand
    Definition: Inorganic compound
    Information:
    Potassium Bromide may be used in the treatment of colic, as an anti-convulsant and have sedative effects. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Practolol
    Dalzic, Eraldin, Eraldina, Teranol
    Banned
    Click to expand
    Definition: Beta blocker
    Information:
    It is used for emergency treatment of cardiac arrhythmias.
  • Pramoxine
    Anugesic
    Conditionally Permitted
    Click to expand
    Definition: Local anaesthetic
    Information:
    Pramoxine is used for the temporary local relief of pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Prasterone
    Intrarosa
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An anabolic steroid used to treat aderenal insufficiency, hormone therapy and reproductive tract diseases. It has no legitimate therapeutic indication in the equine athlete.
  • Prazepam
    Demetrin, Lysaxia, Prazene
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    Prazepam is a benzodiazepine derivative used for the relief of anxiety in humans.
  • Prazosin
    Hypovase
    Conditionally Permitted
    Click to expand
    Definition: Antihypertensive
    Information:
    Prazosin may be used in the treatment of hypertension and heart disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Prednisolone
    Codelcortone, Deltacortril, Dhasolone, Pred Forte, Prednisol, Predsolone, Prelone, Solone
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Prednisolone is used for the treatment of auto-immune disorders, and as an inflammatory and immunosuppressive medication. Prednisolone is a Threshold Substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Prednisone
    Deltisone, Hostacortin, Meticorten, Predni Tablinen, Sone, Sterapred, Ultracortene
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Prednisone is used for the treatment of auto-immune disorders, and as an inflammatory and immunosuppressive medication. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Pregabalin
    Alzain, Axalid, Lecaent, Lyrica
    Conditionally Permitted
    Click to expand
    Definition: Anti-convulsant
    Information:
    Pregabalin may be used in the treatment of epilepsy and pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Prenylamine
    Segontin
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    Prenylamine has been used for the treatment of angina in humans. It depletes myocardial catecholamine stores, and acts as a calcium channel blocker.
  • Pridinol
    Lyseen, Nonplesin, ParKS
    Banned
    Click to expand
    Definition: Muscle relaxant
    Information:
    Pridinol is a centrally acting muscle relaxant used for the symptomatic relief of muscle spasms in humans.
  • Prifinium Bromide
    Padrin, Riabal
    Conditionally Permitted
    Click to expand
    Definition: Anti-spasmodic
    Information:
    Prifinium bromide may be used to relieve pain and spasms. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Prilocaine
    Citanest, Citocaina, Pristesin F, Xylonest, Xylonest-Octapressin
    Conditionally Permitted
    Click to expand
    Definition: Local anaesthetic
    Information:
    Prilocaine is used for the temporary local relief of pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Primidone
    Mylepsinum, Mysoline
    Banned
    Click to expand
    Definition: Anticonvulsant
    Information:
    Primidone is an anti-epileptic drug, which is also used in humans for the control of essential tremors. Phenobarbitone is one of its metabolites.
  • Probenecid
    Benemid, Benemide, Benuryl, Probecid, Pro-Cid, Solpurin, Urocid
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Probenecid is used for the prevention of gout in humans; it aids in the elimination of uric acid in the urine. It has also been used to inhibit the excretion of some antibiotics (including penicillin) in the urine, thereby increasing their concentration in the blood. It has been used as a 'masking agent'.
  • Procainamide
    Pronestyl, Procan, Procanbid
    Conditionally Permitted
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    Procainamide may be used in the treatment of heart rhythm abnormalities. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Procaine
    Depocillin, Duphapen, Neopen
    Conditionally Permitted
    Click to expand
    Definition: Local anaesthetic
    Information:
    Procaine is found in combination with penicillin as procaine penicillin. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Procarbazine
    Matulane, Natulan
    Banned
    Click to expand
    Definition: Chemotherapy
    Information:
    Procarbazine is an antineoplastic drug most frequently used in human patients for the treatment of Hodgkin's disease.
  • Procaterol
    Meptin
    Banned
    Click to expand
    Definition: Beta adrenergic receptor agonist
    Information:
    Procaterol is a beta-2 adrenergic agonist used as a short acting bronchodilator in humans for the treatment of a number of respiratory conditions, including asthma.
  • Prochlorperazine
    Stemetil
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Prochlorperazine is a group 3 phenothiazine antipsychotic agent. It is also used in humans for the treatment of nausea and vomiting. It is given orally and intramuscularly. Its adverse effects include extrapyramidal symptoms.
  • Procyclidine
    Arpicolin, Kemadrin
    Banned
    Click to expand
    Definition: Anticholinergic
    Information:
    Procyclidine is an antimuscarinic drug used in humans for the treatment of drug-induced Parkinson's disease, and drug-induced extrapyramidal symptoms.
  • Proglumide
    Milid
    Banned
    Click to expand
    Definition: Cholecystokinin antagonist
    Information:
    Proglumide is a cholecystokinin antagonist which reduces gastrointestinal motility and gastric secretion. There are also reports that it enhances the analgesic effects of opioid agents, and impedes the development of tolerance to them.
  • Proguanil
    Paludrine
    Banned
    Click to expand
    Definition: Antimalarial
    Information:
    Proguanil is used for the chemoprophylaxis of malaria, occasionally in combination with other agents.
  • Prolintane
    Promotil, Katovit N
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Prolintane is a sympathomimetic amine with amphetamine like properties, which has been used in humans as a stimulant. It has been used illegally as a recreational drug.
  • Promazine
    Liranol, Prazine, Protactyl, Sparine, Talofen
    Conditionally Permitted
    Click to expand
    Definition: Sedative
    Information:
    Promazine may be used as a sedative and anaesthetic premedication. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Promethazine
    Phenergan, Fargan, Romergan, Promethagan
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    Promethazine is an antihistamine used for the treatment of allergic conditions including hay fever, urticaria and anaphylaxis in humans. Its use may be associated with sedative effects, and it is occasionally used for the treatment of insomnia. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Pronethalol
    Alderlin, Nethalide
    Banned
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    Pronethalol is a beta blocking agent. It is not used in human medicine due to concerns regarding carcinogenic effects in laboratory animals.
  • Propafenone
    Arythmol, Rythmol
    Banned
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    Propafenone is used in man for the prophylaxis and treatment of some cardiac diseases, including, for example, ventricular arrhythmias, and some supra-ventricular arrhythmias.
  • Propallylonal
    Quietal
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Propallylonal is one of the older barbiturate sedative agents that is little used now, although there are reports that it is still in use as a sleeping aid in some countries.
  • Propanidid
    Epontol
    Banned
    Click to expand
    Definition: Anaesthetic
    Information:
    Propanadid is a short acting, intravenous anaesthetic agent used in humans for both the induction of anaesthesia, and for short term anaesthesia. It was withdrawn from the market due to concerns about anaphylactic reactions, although these may have been caused by the vehicle in which it was prepared, rather than by the agent itself. It does not appear to be much in use currently.
  • Propantheline (Propanthelline)
    Corrigast, Ercorax, Ercoril, Ercotina, Pantheline, Pro-Banthine, Propantel
    Conditionally Permitted
    Click to expand
    Definition: Anticholinergic
    Information:
    Propantheline (Propanthelline) may be used in muscle spasms of the digestive tract. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Propanthelline (Propantheline)
    Corrigast, Ercorax, Ercoril, Ercotina, Pantheline, Pro-Banthine, Propantel
    Conditionally Permitted
    Click to expand
    Definition: Anticholinergic
    Information:
    Propanthelline (Propantheline) may be used in muscle spasms of the digestive tract. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Proparacaine (Proxymetacaine)
    See Proxymetacaine
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    Proparacaine is an alternative name for the local anaesthetic Proxymetacaine (see entry under that name).
  • Propentofylline
    Vivitonin
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Propentofylline may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Propiomazine
    Largon
    Banned
    Click to expand
    Definition: Tranquiliser
    Information:
    Propiomazine is a phenothiazine sedative with antihistamine actions. It is used to induce drowsiness, and to relieve anxiety prior to general anaesthesia.
  • Propionylpromazine
    Banned
    Click to expand
    Definition: Tranquiliser
    Information:
    Propionylpromazine is a phenothiazine sedative. It has reportedly been used illicitly to alter performance in racehorses. It was withdrawn from equine use in the USA due to cases of irreversible penile paralysis in stallions.
  • Propiram
    Dirame
    Banned
    Click to expand
    Definition: Opiod receptor agonist
    Information:
    Propiram is an apparently non-addictive opioid analgesic which has received attention for the control of moderate to severe pain in humans.
  • Propofol
    Rapinovet, PropoFlo
    Conditionally Permitted
    Click to expand
    Definition: Anaesthetic
    Information:
    Propofol may be used for sedation or to induce anaesthesia. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Propoxycaine
    Pravocaine, Ranocaine
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    It is used for infiltration anaesthesia and nerve block in dental procedures.
  • Propoxyphene
    Capadex, Darvon, Darvocet-N, Di-Antalvic, Di-Gesic, Lentogesic
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    It is used for the treatment of pain, and as an antitussive and local anaesthetic.
  • Propranolol
    Inderal, Avlocardyl, Deralin
    Conditionally Permitted
    Click to expand
    Definition: Beta blocker
    Information:
    Propranolol may be used in the treatment of abnormal heart rhythms. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Propylhexedrine
    Benzedrex, Eggobesin, Eventin, Eventine
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Propylhexedrine is a sympathomimetic and central nervous system stimulant. It is used as a nasal decongestant (by inhalation), and has been used as an appetite suppressant.
  • Propyphenazone
    Saridon
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It has analgesic and antipyretic effects, similar to those of Phenazone.
  • Proquazone
    Biarison
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    It is used for the treatment of rheumatic diseases and pain states.
  • Prostanozol
    Prostanozol
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Prostanozol is an anabolic steroid detected in some types of nutritional supplements produced for human use. Although they have been used with bone fide medical intent in horses, anabolic steroids have also been used illicitly in equine sports to attempt to improve performance, mainly due to their effect of promoting muscular development. The use of anabolic steroids long term, or at high doses, carries significant risks.
  • Prothipendyl
    Tolnate
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Prothipendyl is an azo-phenothiazine with sedative, anti-emetic and antihistamine effects. It was investigated in the 1960s as an agent for the sedation of elderly patients with mental disease.
  • Protokylol
    Asmetil, Beres, Caytine, Palison, Ventaire
    Banned
    Click to expand
    Definition: Sympathomimetic
    Information:
    It is used as a beta adrenergic bronchodilator.
  • Protriptyline
    Triptil, Vivactil
    Banned
    Click to expand
    Definition: Stimulant antidepressant
    Information:
    Protriptyline is a tricyclic antidepressant agent used in humans for the treatment of depression, and a number of other psychological disorders, including narcolepsy, and obstructive sleep apnoea.
  • Proxibarbital
    Ipronal
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Proxibarbital is a barbiturate derivative with sedative, hypnotic and anticonvulsive properties. It has been used in the treatment of migraine in humans.
  • Proxymetacaine (Proparacaine)
    Minims Proxymetacaine, Alcaine
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    Proxymetacaine (Proparacaine) hydrochloride is a local anaesthetic agent used as eye drops for ocular anaesthesia in humans.
  • Proxyphylline
    Brontyl, Monophyllin, Monophylline, Neofyllin, Proxy-Retardoral, Purofilina, Purophyllin, Sanwaphyllin, Sigophyl, Spantin, Spasmolysin, Thean, Theoden
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    Proxyphylline is a methylxanthine agent used in humans for the relief and prophylaxis of bronchoconstriction in asthma. It has also been shown to increase coronary blood flow.
  • Pseudoephedrine
    Sudafed, Galpseud
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Pseudoephedrine is a systemic (oral) nasal decongestant used symptomatically in humans. It is available in proprietary preparations.
  • Psilocin
    Banned
    Click to expand
    Definition: Psychedelic
    Information:
    Psilocin is a psychedelic principle that occurs in a number of species of hallucinogenic mushrooms.
  • Pyridostigmine
    Mestinon, Regonol
    Banned
    Click to expand
    Definition: Anticholinesterase
    Information:
    Pyridostigmine is an anticholinesterase, and it therefore enhances neuromuscular transmission. It is used in humans for the treatment of myasthenia gravis, for which it has a longer action duration than neostigmine. It also increases intestinal motility.
  • Pyrilamine (Mepyramine)
    Albatussin, Anthisan
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Pyrilamine (Mepyramine) may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Pyrimethamine
    Daraprim, Erbaprelina, Pirimecidan, Tindurin
    Conditionally Permitted
    Click to expand
    Definition: Anti-parasitic
    Information:
    Pyrimethamine may be used in the treatment of parasitic disease such as malaria and toxoplasmosis. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Pyrithyldione
    Persedon
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Pyrithyldione is a sedative hypnotic agent which was widely withdrawn from use in humans due to its association with the development of agranulocytosis.
  • Pyrrobutamine
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    This is a substance deemed to have no legitimate use in equine medicine. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Quetiapine
    Seroquel
    Banned
    Click to expand
    Definition: Dopamine agonist
    Information:
    Human anti-psychotic drug with high potential for abuse. Used in humans as an anti-depressant and to treat schizophrenia and bipolar disorder.
  • Quinalbarbital (Secobarbitone)
    Barbosec, Bipanal, Bipinal, Evronal, Evrronal, Hypotrol, Hyptran, Imesonal, Immenox, Meballymal, Meballymalum, Novosecobarb, Quinalspan, Sebar, Secobarbital, Sedutain, Seotal, Sodium Seconal, Somosal, Synate, Trisomnin
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Quinalbarbital (Secobarbitone) is a hypnotic barbituric acid derivative used (in combination with cinchocaine) as an agent for chemical euthanasia in horses, cattle, dogs and cats. It has a rapid onset of action and depresses the central nervous system, including the respiratory centres.
  • Quinbolone
    Anabolicum Vister
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Quinbolone is an anabolic steroid. It has little anabolic effect in itself, but is metabolised into the far more potent Boldenone by the removal of a cyclopentenyl ether group. Although they have been used with bone fide medical intent in horses, anabolic steroids have also been used illicitly in equine sports to attempt to improve performance, mainly due to their effect of promoting muscular development. The use of anabolic steroids long term, or at high doses, carries significant risks.
  • Quinethazone
    Aquamox, Hydromox, Idrokin
    Conditionally Permitted
    Click to expand
    Definition: Diuretic
    Information:
    Quinethazone may be used in the control of hypotension and oedema With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Quinidine
    Biquin, Chinidin, Kiditard, Kinichron, Kinidin, Kinidin Durules, Kinidine, Longachin, Longacor, Quinaglute, Quinalan, Quinidine, Quinobarb, Solfachinid, Systodin
    Conditionally Permitted
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    Quinidine may be used in the treatment of heart rhythm abnormalities. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Quinine
    Adaquin, Bi-Chinine, Biquinate, Chinine, Kinin, Legatrin, Myoquin, Quinamm, Quinate, Quinbisul, Quindan, Quinine, Quinoctal, Quinsul, Quiphile
    Conditionally Permitted
    Click to expand
    Definition: Anti-parasitic
    Information:
    Quinine may be used in the treatment of malaria and babesiosis. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Quinisocaine
    Isochinol, Dimethisoquin, Haenal, Histaderme, Prulantex, Pruralgan, Pruralgin, Quinoleine, Quotane
    Banned
    Click to expand
    Definition: Topical anaesthetic
    Information:
    Quinisocaine, or dimethisoquin, is a local anaesthetic agent which has been used in humans in topical form as an antipruritic agent.
  • Ractopamine
    Paylean
    Banned
    Click to expand
    Definition: Beta agonist
    Information:
    Ractopamine is a beta adrenoceptor agonist which has recently been shown to improve growth performance and carcase composition in pigs.
  • RAD140
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An investigational selective androgen receptor modulator (SARM) used for treatment of muscle wasting with no legitimate therapeutic indication in the equine athlete.
  • Raloxifene
    Evista
    Banned
    Click to expand
    Definition: Oestrogen receptor modulator
    Information:
    Raloxifene is a selective oestrogen receptor modulator (SERM) is used in women for the treatment and prevention of postmenopausal osteoporosis.
  • Ramifenazone (Isopyrin)
    Delta-Tomanol, Tomanol
    Banned
    Click to expand
    Definition: Pain relief
    Information:
    Used as an anti-inflammatory and painkiller. Not commercially available in the USA or EU. Not approved for use in veterinary medicine.
  • Rauwolfia
    Banned
    Click to expand
    Definition: Tranquiliser
    Information:
    The plant contains reserpine and has no legitimate use in the competition horse.
  • Remifentanil
    Ultiva
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    Remifentanil is an opioid analgesic used in humans for analgesia during general anaesthesia, and in ventilated intensive care patients. In humans, its action duration is short.
  • Reproterol
    Bronchodil, Bronchospasmin, Broncospasmin, Epiferol, Gensasmol, Reprol, Sanasma, Teofluid
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    Reproterol is a selective beta-2 sympathetic agonist. It has been used as a bronchodilator in human asthmatic patients.
  • Reserpine
    Novoreserpine, Serpasil
    Banned
    Click to expand
    Definition: Tranquiliser
    Information:
    Reserpine is an alkaloid used for long term sedation in horses. A number of side effects have been reported, including hypotension, reduced heart rate, increased gastrointestinal motility, and diarrhoea.
  • Rimiterol
    Puilmodil
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    Rimiterol is a selective beta-2 sympathomimetic agonist, which has been shown to be an effective bronchodilator in human patients with asthma.
  • Risedronate
    Actonel, Atelvia, Benet
    Banned
    Click to expand
    Definition: Bone metabolism agent
    Information:
    A bisphosphonate drug used to strengthen bone, treat osteoporosis and Pagets disease. It is considered a risk to equine welfare and has no legitimate therapeutic indication in the equine athlete
  • Risperidone
    Risperdal
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Risperidone may be categorised as an 'atypical antipsychotic drug'. It is one of a number of agents suggested as being better tolerated in humans, and less likely than other antipsychotic drugs, to carry the risk of the development of extrapyramidal symptoms. It is used for the treatment of acute and chronic psychoses.
  • Ritodrine
    Yutopar
    Banned
    Click to expand
    Definition: Tocolytic
    Information:
    Ritodrine is a beta-2 agonist used in human medicine as a tocolytic, i.e. to postpone premature labour, with the aim of reducing the risk of harm to the unborn child.
  • Rofecoxib
    Ceoxx, Ceeoxx, Vioxx
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Rofecoxib is a non-steroidal anti-inflammatory drug (NSAID) that was withdrawn from the human market in 2004, due to fears about an increased risk of heart disease and stroke associated with high dose, long term use.
  • Romifidine
    Sedivet Solution I.V.
    Conditionally Permitted
    Click to expand
    Definition: Sedative
    Information:
    Romifidine (Sedivet) is permitted to be administered at a maximum dosage of 5mg 30 minutes (if using 10mg/ml concentration of Romifidine the allowable dose is 0.5ml; if using other concentrations of compounded Romifidine consult with a veterinarian for appropriate dosing) prior to competition but must be submitted on the medications report form. Failure to do so will be considered a violation. (Exception: European region does not allow the use of Romifidine). Romifidine may be used as a sedative, an anaesthetic premedication and for analgesia. The detection time is estimated to be 60 hours (2.5 days) after intra-venous administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Ropivacaine
    Naropin
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    Ropivicaine is a local anaesthetic used in humans in a wide range of applications, including epidural anaesthesia and nerve blocking. It is an isomer of bupivicaine, with a lower cardiotoxic potential.
  • Roxadustat
    Banned
    Click to expand
    Definition: Hypoxia Inducible Factor Activator
    Information:
    A drug which increases endogenous production of erythropoetin. It has no legitimate therapeutic indication in the equine athlete.
  • S4
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A selective androgen receptor modulator (SARM) with anabolic activity and also known as Andarine. It has no legitimate therapeutic indication in the equine athlete.
  • Salbutamol (Albuterol)
    Ventolin, Proventil, Torpex, Volmax, Ventipulmin
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Salbutamol (albuterol) may be used in the treatment of respiratory disease. The detection time is estimated with 96 hours (4 days) after inhalational administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Salicylamide
    BC Powder
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Salicylamide is an analgesic and antipyretic agent, most commonly associated with the relief of headache in humans.
  • Salicylic acid
    Aspirin, Clearasil Medicated Astringent, Compound-W, Cornina, Coroplast, Egocappol, Fomac, Gehwol, Guttaplast, Gyan, Hydrisalic, Ionil Plus, Keralyt, Occlusal, Phytodermine, Salac, Salicyl, Saligel, SaSha, Sebcur, Subucare, Soluver, Squamasol, Verrugon
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Salicylic acid may be used to relieve pain, inflammation and control fever. Salicylic acid is a Threshold Substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Salmeterol
    Aerometrol, Arial, Astmerole, Fujimycin, Salmetedur, Serevent
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Salmeterol may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Scopolamine (Hyoscine)
    Transderm-scop, Scopoderm
    Conditionally Permitted
    Click to expand
    Definition: Anticholinergic
    Information:
    Scopolamine (hyoscine) may be used in the treatment of gastrointestinal tract spams such as colic. Scopolamine (Hyoscine) is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Secobarbitone (Quinalbarbital)
    Barbosec, Bipanal, Bipinal, Evronal, Evrronal, Hypotrol, Hyptran, Imesonal, Immenox, Meballymal, Meballymalum, Novosecobarb, Quinalspan, Sebar, Secobarbital, Sedutain, Seotal, Sodium Seconal, Somosal, Synate, Trisomnin
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Secobarbitone (Quinalbarbital) is a hypnotic barbituric acid derivative used (in combination with cinchocaine) as an agent for chemical euthanasia in horses, cattle, dogs and cats. It has a rapid onset of action and depresses the central nervous system, including the respiratory centres.
  • Selegiline
    Eldepryl, Zelapar
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Selegiline is a monoamine oxidase-B inhibitor used in humans for the management of Parkinson's disease.
  • Sertraline
    Lustral
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    Sertraline is a selective serotonin re-uptake inhibitor (SSRI). It is used in humans for the treatment of depressive illness, obsessive-compulsive disorder, and post-traumatic stress disorder in women.
  • Sibutramine
    Reductil
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Sibutramine is a centrally acting appetite suppressant, and it is used in man as an adjunct to the treatment of obesity.
  • Sildenafil
    Viagra, Revatio
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    Sildenafil is a phosphodiesterase type-5 inhibitor used in humans for the treatment of erectile dysfunction, and some forms of pulmonary hypertension.
  • Sotalol
    Beta-Cardone, Sotacor
    Conditionally Permitted
    Click to expand
    Definition: Beta blocker
    Information:
    Sotalol may be used in the treatment of abnormal heart rhythms. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Sparteine
    Depasan, Spartopan
    Banned
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    Sparteine is a Specified Substance. It is an anti-arrhythmic alkaloid which also stimulates uterine contractions. It can be extracted from some species of broom (e.g. Cytisus scoparius) and lupin (e.g. Lupinus luteus). It is not used therapeutically in horses.
  • Spironolactone
    Aldactone, Spiractin
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Spironolactone potentiates the effects of thiazide and loop diuretics by acting as an aldosterone antagonist; it is a potassium-sparing diuretic. It is used in humans for the treatment of ascites and oedema in liver cirrhosis, for nephrotic syndrome, and for congestive heart failure.
  • Stanozolol
    Winstrol, Sungate, Stargate
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Stanozolol is an anabolic steroid. Although they have been used with bone fide medical intent in horses, anabolic steroids have also been used illicitly in equine sports to attempt to improve performance, mainly due to their effect of promoting muscular development. The use of anabolic steroids long term, or at high doses carries significant risks.
  • Stenbolone
    Anatrofin
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Stenbolone is an anabolic steroid. Although they have been used with bone fide medical intent in horses, anabolic steroids have also been used illicitly in equine sports to attempt to improve performance, mainly due to their effect of promoting muscular development. The use of anabolic steroids long term, or at high doses carries significant risks.
  • Strychnine
    Boomer-Rid, Certox, Estricnina, Gopher Bait, Gopher-Gitter, Hare-Rid, Kwik-Kil, Mole Death, Mouse-Nots, Mouse-Rid, Mouse-Tox, Pied Piper Mouse Seed, Ro-Dex, Sanaseed, Strychnos
    Banned
    Click to expand
    Definition: Muscular convulsions
    Information:
    Strychnine is a naturally occurring alkaloid derived from the tree Strychnos nux vomica. It is highly poisonous, but has nevertheless been used in the past as a stimulant.
  • Styramate
    Linaxar, Sinaxar
    Banned
    Click to expand
    Definition: Anticonvulsant
    Information:
    Styramate is a non-sedative skeletal muscle relaxant.
  • Sufentanil
    Sufenta
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    Sufentanil is a synthetic opioid analgesic agent with sedative properties used in general anaesthesia in humans.
  • Sulfasalazine
    Conditionally Permitted
    Click to expand
    Definition: Disease-Modifying Anti-Rheumatic Drug (DARD)
    Information:
    Sulfasalazine may be used in the treatment of gastrointestinal disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Sulforidazine
    Imagotan, Inofal
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Sulforidazine is an antipsychotic agent. A metabolite of thioridazine, itself a phenothiazine antipsychotic agent, sulforidazine shows greater potency than its parent drug.
  • Sulindac
    Clinoril
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Sulindac is a non-steroidal anti-inflammatory drug (NSAID) used in humans for the treatment of pain and inflammation associated with musculoskeletal disorders, and acute gout.
  • Sulpiride
    Dolmatil, Sulpor
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Sulpiride is an antipsychotic agent used in humans for the treatment of schizophrenia, and occasionally to treat Tourette syndrome.
  • Sumatriptan
    Imigran
    Banned
    Click to expand
    Definition: Serotonin agonist - migraine treatment
    Information:
    Sumatriptan is a serotonin agonist used for the treatment of acute migraine and (when given by subcutaneous injection) cluster headache in humans.
  • Suprofen
    Maldocil, Masterfen, Procofen, Profenal, Srendam, Sulproltin, Suprocil, Suprol, Sutoprofen
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Suprofen may be used to relieve pain, inflammation and control fever. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Suxibuzone
    Danilon
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Suxibuzone may be used to relieve pain, inflammation and control fever. It is a pro-drug of phenylbutazone, a Controlled Medication. The detection times should follow the same indications as phenylbutazone. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Synephrine
    Chibro, Sympatol, Uvicol
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Synephrine has been used as an aid to weight loss in humans, although there is some controversy as to its efficacy, and there are reports of some serious adverse reactions. It is obtained from citrus trees, in particular the bitter orange, Citrus Aurantium. Synephrine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance.
  • Tamoxifen
    Nolvadex
    Banned
    Click to expand
    Definition: Oestrogen receptor modulator
    Information:
    Tamoxifen is an oestrogen receptor antagonist used in the treatment of breast cancer in women. It has also been used in the management of breast pain, and some forms of infertility.
  • Temazepam
    Euhypnos, Normison, Temtabs
    Banned
    Click to expand
    Definition: Tranquiliser
    Information:
    Temazepam is an anxiolytic benzodiazepine sedative. It has been used in humans as a pre-medicant before surgery, as an anxiolytic prior to investigative procedures, and for the treatment of insomnia.
  • Tenoxicam
    Mobiflex, Tilcotil
    Banned
    Click to expand
    Definition: Pain relief
    Information:
    Tenoxicam is a non-steroidal anti-inflammatory drug (NSAID) used in humans for the treatment of pain and inflammation associated with musculoskeletal disorders. Its action is of long duration, and can be given on a once daily basis.
  • Tepoxalin
    Zubrin
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Tepoxalin is a non-steroidal anti-inflammatory drug (NSAID) used in dogs for the treatment of acute and chronic musculoskeletal conditions. It is effective against both cyclooxygenase and lipoxygenase inflammatory pathways.
  • Terazocin (Terazosin)
    Hytrin
    Banned
    Click to expand
    Definition: Alpha adrenergic blocker
    Information:
    Terazocin is an alpha-adrenoceptor blocking agent that is used in humans for the treatment of mild to moderate hypertension, as well as for the symptomatic relief of benign prostatic hyperplasia.
  • Terazosin (Terazocin)
    Hytrin
    Banned
    Click to expand
    Definition: Alpha adrenergic blocker
    Information:
    Terazocin is an alpha-adrenoceptor blocking agent that is used in humans for the treatment of mild to moderate hypertension, as well as for the symptomatic relief of benign prostatic hyperplasia.
  • Terbutaline
    Bricanyl, Brethine
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Terbutaline may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Terfenadine
    Seldane, Teldane, Triludan
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    Terfenadine is an antihistamine formerly used for the treatment of allergies in man. Due to concerns about adverse effects, it has been superceded by other antihistamines. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Testolactone
    Teslac
    Banned
    Click to expand
    Definition: Aromatase inhibitor
    Information:
    Testolactone is an antineoplastic agent. A progesterone derivative, it acts by inhibiting the enzyme steroid aromatase, and thereby reduces endogenous oestrogen production. It is used in the treatment of some forms of breast cancer in women.
  • Testosterone
    Andriol, Androderm, Androgel, Androtardyl, Intrinsa, Striant, Testogel, Testopatch, Testoviron
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Testosterone is a naturally occurring steroid hormone produced primarily in the testes (and, to a lesser degree, the ovaries). It is important in the development of the male reproductive organs, male secondary sexual characteristics and male behaviour. It has anabolic effects.
  • Tetracaine
    Ametop, Minims Amethocaine Hydrochloride
    Conditionally Permitted
    Click to expand
    Definition: Local anaesthetic
    Information:
    Tetracaine is used for the temporary local relief of pain. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Tetrahydrogestrinone (THG)
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Tetrahydrogestrinone (THG) is an anabolic steroid used illicitly to improve performance in elite human sports. Although they have been used with bone fide medical intent in horses, anabolic steroids have also been used illicitly in equine sports to attempt to improve performance, mainly due to their effect of promoting muscular development. The use of anabolic steroids long term, or at high doses, carries significant risks.
  • Thebaine
    Banned
    Click to expand
    Definition: Opiod alkaloid
    Information:
    Thebaine, also known as paramorphine, is an opiate alkaloid similar in structure to morphine, but with stimulatory rather than depressive properties. It is not used therapeutically. Thebaine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance.
  • Thenoic acid
    Thioveol
    Conditionally Permitted
    Click to expand
    Definition: D-amino acid oxidase inhibitor
    Information:
    Thenoic acid may be used in the treatment of respiratory disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Theobromine
    Theosalvose
    Conditionally Permitted
    Click to expand
    Definition: Stimulant
    Information:
    Theobromine may be used to stimulate the central nervous system and cardiac muscle. Theobromine is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Theophylline
    Elixophyllin, Novo-Theophyl, Nuelin, Quibron-T, Retafyllin, Theo-Dur, Theolair, Theolin, Uniphyl, Uniphyllin, Xanthium, Xantivent
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Theophylline may be used in the treatment of respiratory disease. Theophylline is a Specified Substance. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by Horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • THG (Tetrahydrogestrinone)
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    THG (Tetrahydrogestrinone) is an anabolic steroid used illicitly to improve performance in elite human sports. Although they have been used with bone fide medical intent in horses, anabolic steroids have also been used illicitly in equine sports to attempt to improve performance, mainly due to their effect of promoting muscular development. The use of anabolic steroids long term, or at high doses, carries significant risks.
  • Thiethylperazine
    Torecan
    Banned
    Click to expand
    Definition: Anti-emetic
    Information:
    Thiethylperazine is a phenothiazine anti-emetic agent used to control nausea and vomiting associated with cancer chemotherapy.
  • Thiopropazate
    Dartalan
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Thiopropazate is a phenothiazine derivative used as an antipsychotic agent in humans.
  • Thioproperazine
    Cephalmin, Majeptyl, Mazeptyl, Megeptil, Sulfenazin, Vontil
    Banned
    Click to expand
    Definition: Cataleptic
    Information:
    Thioproperazine is a phenothiazine antipsychotic agent used in humans for the control of schizophrenia.
  • Thioridazine
    Mallorol, Mellaril-S, Melleril, Melleretten, Novoridazine, Ridazine, Thioril
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Thioridazine is a phenothiazine antipsychotic agent used in man for the treatment of schizophrenia. Due to concerns about severe adverse effects, it is used far less today than previously.
  • Thiothixene
    Navane
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Thiothixene is a thioxanthene antipsychotic agent used in humans for the treatment of schizophrenia, and other psychotic disorders.
  • Thonzylamine
    Neohetramine, Tonamil
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    It is used as an antipruritic. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Thozalinone
    Stimsen
    Banned
    Click to expand
    Definition: Psychoactive
    Information:
    Thozalinone is a psychostimulant with effects somewhat similar to those of Amphetamine.
  • Thymosin (synthetic fragments)
    TB500
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Thymosins are small proteins with anti-inflammatory and anabolic effects.
  • Tiaprofenic Acid
    Surgam, Surgamyl, Tiaprofen
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Tiaprofenic acid is a non-steroidal anti-inflammatory drug (NSAID). A propionic acid derivative, it is used in humans for the control of pain and inflammation in musculoskeletal disorders. It is sometimes associated with the development of severe cystitis in human patients.
  • Tibolone
    Livial
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Tibolone is used for hormone replacement therapy in women. It has both oestrogenic and progestogenic activity, and is used for the treatment of oestrogen deficiency, and occasionally for osteoporosis prophylaxis.
  • Tildronate
    Tildren
    Conditionally Permitted
    Click to expand

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Tiletamine
    Telazol
    Conditionally Permitted
    Click to expand
    Definition: Anaesthetic
    Information:
    Tiletamine is a general anaesthetic agent resulting in sedation, immobility, amnesia and analgesia. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Tilidin
    Valoron
    Banned
    Click to expand
    Definition: Opioid
    Information:
    Tilidin can be used to treat pain however the substance has no legitimate therapeutic use in the sports horse
  • Tiludronate disodium
    Tildren bisphosphonate
    Conditionally Permitted
    Click to expand

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Tiludronic Acid
    Tildren, Skelid
    Conditionally Permitted
    Click to expand
    Definition: Bisphosphonate
    Information:
    Tiludronic acid may be used in the treatment of orthopaedic disease. The detection time is estimated with 672 hours (28 days) after oral administration. A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horses system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc.. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Timolol
    Blocadren, Timoptol
    Conditionally Permitted
    Click to expand
    Definition: Beta blocker
    Information:
    Timolol may be used in the treatment of ocular diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Tiotropium
    Spiriva
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Tiotropium may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Tocainide
    Tonocard
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    Tocainide is a Class 1b anti-arrhythmic agent used to treat some cardiac arrhythmias in humans and dogs. It has not been evaluated for use in horses.
  • Tofenacin
    Elamol, Tofacine
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    Tofenacin is a metabolite of orphenadrine and, similarly, is an anticholinergic agent.
  • Tolfenamic Acid
    Clotam Rapid
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Tolfenamic acid is a non-steroidal anti-inflammatory drug, licensed in the UK specifically for the treatment of acute migraine attacks in humans.
  • Tolmetin
    Tolectin
    Banned
    Click to expand
    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Tolmetin is a non-steroidal anti-inflammatory drug (NSAID) that is used in humans for the treatment of musculoskeletal disorders.
  • Tolvaptan
    Samsca, Jinarc
    Banned
    Click to expand
    Definition: Vaptans
    Information:
    A drug which eliminates water from the body without electrolyte loss and is used in the treatment of heart failure. It has no legitimate therapeutic indication in the equine athlete.
  • Tolycaine
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Torasemide
    Torem, Demadex
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Torasemide is a loop diuretic (similar to frusemide) inhibiting reabsorption of salt from the ascending limb of the Loop of Henle in the renal nephron. It is used in humans for the treatment of oedema, especially pulmonary oedema, and hypertension.
  • Toremifene
    Fareston
    Banned
    Click to expand
    Definition: Oestrogen receptor modulator
    Information:
    Toremifene is licensed for the treatment of some forms of metastatic breast cancer in postmenopausal women, although it is only infrequently used in the UK.
  • Tramadol
    Zamadol, Zydol, Ryzolt, Ultram, Tramal
    Banned
    Click to expand
    Definition: Analgesic
    Information:
    Tramadol is an opioid analgesic used in humans for the control of moderate to severe pain. It is less effective than some of the other opioids for pain relief, but has relatively fewer side effects. Repeated administration of opioids can cause dependence and tolerance.
  • Tramazoline
    Biciron, Ellatun, Rhinaspray, Rinogutt, Spray-Tish
    Banned
    Click to expand
    Definition: Sympathomimetic
    Information:
    Tramazoline is a sympathomimetic vasoconstrictor agent that has been used as a nasal decongestant in man.
  • Tranexamic Acid
    Amcacid, Amchafibrin, Amstat, Anvitoff, Carxamin, Ciclokapron, Emorhalt, Exacyl, Frenolyse, Hexapromin, Hexatron, Tranex, Tranexan, Transamin, Transamlon, Ugurol
    Conditionally Permitted
    Click to expand
    Definition: Anti-fibrinolytic
    Information:
    Tranexamic acid may be used in the treatment and prevention of bleeding disorders. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Tranylcypromine
    Parnate, Jatrosom
    Banned
    Click to expand
    Definition: Mono-amine oxidase inhibitor
    Information:
    Tranylcypromine is a monoamine-oxidase inhibitor (MAOI) used in humans for the treatment of depressive illness. It is considered to be the most hazardous of the MOAI agents.
  • Trazodone
    Beneficat, Desyrel, Molipaxin
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    Trazodone is a tricyclic antidepressant agent with sedative properties, which is used in man for the treatment of depressive conditions where sedation is required, and is also used in the treatment of anxiety.
  • Trena
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Trena, also known as trenbolone, is an anabolic steroid which has been used as a growth promoter in animals. Although used with bone fide medical intent in horses, anabolic steroids have also been used illicitly in equine sports to attempt to improve performance, mainly due to their effect of promoting muscular development. The use of anabolic steroids long term, or at high doses, carries significant risks.
  • Trenbolone
    Finaplix
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    Trenbolone is an anabolic steroid which has been used as a growth promoter in animals. Although used with bone fide medical intent in horses, anabolic steroids have also been used illicitly in equine sports to attempt to improve performance, mainly due to their effect of promoting muscular development. The use of anabolic steroids long term, or at high doses, carries significant risks.
  • Trestolone
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    An experimental anabolic steroid with no legitimate therapeutic indication in the equine athlete.
  • Triamcinolone
    Aristocort, Cinolone, Delphi, Ipercortis, Kenacort, Kenalog, Ledercort, Triamcet, Volon
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Triamcinolone is used to treat a wide number of inflammatory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Triamcinolone Acetonide
    Vetalog, Adcortyl
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Triamcinolone acetonide is an anti-inflammatory agent, used in the treatment of orthopaedic disease e.g. osteoarthritis. The detection time is estimated to be 168 hours (7 days) after intra-articular administration. Please remember: A detection time is not the same as a withdrawal time. The detection time is the approximate period of time for which a substance (or its metabolite) remains in a horse's system such that it can be detected by the laboratory. The withdrawal time for a substance adds a safety margin, chosen with professional judgment and discretion to allow for individual differences between horses such as size, metabolism, degree of fitness, recent illness or disease etc. You are advised to seek suitable advice from your treating veterinarian. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Triamcinolone Hexacetonide
    Aristospan
    Conditionally Permitted
    Click to expand
    Definition: Corticosteroid
    Information:
    Triamcinolone hexacetonide is used in the treatment of inflammatory disease. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Triamterene
    Dyrenium, Dytac
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Triamterene is a potassium sparing diuretic used in man for the treatment of hypertension as well as oedema caused by a variety of factors, including heart failure and liver disease.
  • Triazolam
    Apo-Triazo, Halcion, Hypam, Trilam
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    Triazolam is a benzodiazepine agent used to promote sleep in insomnia sufferers.
  • Trichlormethiazide (formerly in Naquasome)
    Achletin, Anatran, Anistadin, Aponorin, Carvacron, Chlopolidine, Cretonin, Esmarin, Fluitran, Flutra, Intromene, Kubacron, Metahydrin, Naqua, Schebitran, Tachionin, Tolcasone, Triflumen
    Conditionally Permitted
    Click to expand
    Definition: Diuretic
    Information:
    Trichlormethiazide may be used in the control of hypotension and oedema. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Triflumeprazine
    Stelazine
    Banned
    Click to expand
    Definition: Phenothiazene
    Information:
    This is a substance deemed to have no legitimate use in equine medicine.
  • Trifluoperazine
    Eskazinyl, Eskazine, Jatroneural, Modalina, Stelazine, Terfluzine, Trifluoperaz
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Trifluoperazine is used in humans as a class 3 phenothiazine antipsychotic agent. It is also used for the treatment of severe nausea and vomiting. Its use in humans is associated with a relatively high incidence of extrapyramidal symptoms.
  • Trifluoromethylphenyl piperazine
    Legal X
    Banned
    Click to expand
    Definition: Psychoactive
    Information:
    Trifluoromethylphenylpiperazine (TFMPP) is a psychoactive drug with no apparent medical applications. It has been abused as a recreational drug by humans.
  • Trifluperidol
    Psicoperidol, Triperidol
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Trifluperidol, a butyrophenone derivative, is an antipsychotic agent that has been used in humans.
  • Triflupromazine (Floupromazine)
    Psyquil, Siquil, Vesprin
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    It is used for the management of psychosis, and the control of nausea and vomiting.
  • Trihexylphenidyl (Trihexyphenidyl)
    Broflex, Benzhexol
    Banned
    Click to expand
    Definition: Acetylcholine inhibitor
    Information:
    Trihexylphenidyl (Trihexyphenidyl) (also known as Benzhexol) is an antimuscarinic (anticholinergic) agent used in humans for the treatment of drug induced parkinsonism (which may be associated with the use of some antipsychotic drugs), and drug induced extrapyramidal symptoms. It is also occasionally used in the treatment of some movement disorders.
  • Trihexyphenidyl (Trihexylphenidyl)
    Broflex, Benzhexol
    Banned
    Click to expand
    Definition: Acetylcholine inhibitor
    Information:
    Trihexyphenidyl (Trihexylphenidyl) (also known as Benzhexol) is an antimuscarinic (anticholinergic) agent used in humans for the treatment of drug induced parkinsonism (which may be associated with the use of some antipsychotic drugs), and drug induced extrapyramidal symptoms. It is also occasionally used in the treatment of some movement disorders.
  • Trimecaine
    Trimecaine HCL
    Banned
    Click to expand
    Definition: Local anaesthetic
    Information:
    Trimecaine is a local anaesthetic and anti-arrhythmic agent, which has been used in human medicine.
  • Trimeprazine
    Panectyl, Repeltin, Vallergan
    Banned
    Click to expand
    Definition: Antipruritic
    Information:
    Trimeprazine, also known as alimemazine, is an antihistamine with sedative effects, used in humans for the treatment of pruritus (for example in eczema) and urticaria. It is generally formulated as the tartrate salt.
  • Trimetazidine
    Vastarel
    Banned
    Click to expand
    Definition: Angina treatment
    Information:
    Trimetazidine is an agent which alters cardiac muscle cell metabolism and has been used as a treatment for angina in humans.
  • Trimipramine
    Surmontil, Stangyl
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    Trimipramine is a tricyclic antidepressant agent used in humans for the treatment of depressive illnesses, especially when a sedative therapeutic effect is required.
  • Tripamide
    Normonal
    Banned
    Click to expand
    Definition: Antihypertensive
    Information:
    Tripamide is a diuretic agent that has been used for the treatment of hypertension in humans.
  • Tripelennamine
    Azaron, PBZ, Pyribenzamine
    Conditionally Permitted
    Click to expand
    Definition: Antihistamine
    Information:
    Tripelennamine may be used in the control of allergies. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Triprolidine
    Actifed, Sudafed
    Banned
    Click to expand
    Definition: Antihistamine
    Information:
    Triprolidine is an antihistamine with mild sedating properties. It is used for the treatment of respiratory allergies in humans, and is often combined with other agents in proprietary preparations for the symptomatic treatment of mild respiratory infections. Note: With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.
  • Trometamol
    Addex-THAM, Alcaphor, Basionic, Tham, Thamacetat, Thamesol, Trisaminol
    Conditionally Permitted
    Click to expand
    Definition: Organic Compound
    Information:
    Trometamol may be used in the treatment of metabolic acidosis. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Tropicamide
    Conditionally Permitted
    Click to expand
    Definition: Anticholinergic
    Information:
    Tropicamide may be used to dilate the pupils during ocular examinations. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Tuaminoheptane
    Armeen L-7, Heptamine, Heptedrine, Heptin, Rinofluimucil, Rinoflumil, Rineptil, Rineptyl, Tuamine
    Banned
    Click to expand
    Definition: Stimulant
    Information:
    Tuaminoheptane is a sympathomimetic vasoconstrictor agent that has been used as a nasal decongestant in man.
  • Tulobuterol
    Hokunalin
    Banned
    Click to expand
    Definition: Bronchodilator
    Information:
    Tulobuterol is a selective beta-2 adrenergic agonist used as a bronchodilator in humans, most frequently for the treatment of asthma. In addition to the inhalation route, it is also available as a transdermal preparation.
  • Tybamate
    Solacen
    Banned
    Click to expand
    Definition: Anxiolytic
    Information:
    Tybamate is an anxiolytic drug. It is a prodrug for meprobamate, which is being withdrawn from the UK market as it is less effective than the benzodiazepine anxiolytics, but more hazardous and capable of inducing dependence.
  • Valdecoxib
    Bextra
    Banned
    Click to expand
    Definition: Pain relief
    Information:
    Valdecoxib is a non-steroidal anti-inflammatory drug (NSAID) that was used in humans for the treatment of conditions such as osteoarthritis and rheumatoid arthritis. It has been withdrawn due to concerns about its adverse effects.
  • Valerenic acid
    Valerenic acid
    Conditionally Permitted
    Click to expand
    Definition: Sedative
    Information:
    Valerenic acid is a constituent of the essential oil of the valerian plant. It may be used as a mild sedative in horses and found in herbal preparations. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Valnoctamide
    Axiquel, Nirvanil
    Banned
    Click to expand
    Definition: Sedative
    Information:
    Valnoctamide is a sedative-hypnotic agent that has been investigated for its use in the control of epilepsy in humans.
  • Valproate
    Epilim, Orlept, Depacon, Depakene
    Banned
    Click to expand
    Definition: Anticonvulsant
    Information:
    Valproate, usually used in the sodium salt form, is used in humans for the treatment of all forms of epilepsy as well as in treatment for migraine prophylaxis. Valproic acid is also used for the treatment of epilepsy.
  • Vanillyl Butyl Ether
    Black Horse Warming Liniment
    Banned
    Click to expand
    Definition: Chemical compound
    Information:
    Vanillyl Butyl Ether may be used as a warming agent.
  • Vardenafil
    Levitra, Vivanza
    Banned
    Click to expand
    Definition: Vasodilator
    Information:
    Vardenafil is a phosphodiesterase type-5 inhibitor licensed for the treatment of erectile dysfunction in humans.
  • Vedaprofen
    Quadrisol
    Conditionally Permitted
    Click to expand
    Definition: Non-steroidal anti-inflammatory
    Information:
    Vedoprofen may be used to relieve pain and inflammation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Velagliflozin
    Senvelgo
    Conditionally Permitted
    Click to expand
    Definition: Anti-hyperglycaemic
    Information:
    Velagliflozin may be used in the treatment of equine metabolic syndrome. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Venlafaxine
    Efexor
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    Venlafaxine is an antidepressant agent, categorised as a serotonin and noradrenaline re-uptake inhibitor (SNRI). In humans it is used to treat major depression and generalised anxiety disorder.
  • Venom - naturally derived and synthetic
    Banned
    Click to expand
    Definition: Muscarinic
    Information:
    The toxin of the rattlesnake, Crotalus horridus, is used as a homeopathic agent to attempt to control exercise induced pulmonary haemorrhage.
  • Verapamil
    Cordilox, Zolvera, Verelan, Calan
    Banned
    Click to expand
    Definition: Anti-arrhythmic
    Information:
    Verapamil is a calcium channel blocker used in humans for the treatment of angina, hypertension and some cardiac arrhythmias. It reduces heart rate, and force of contraction, and therefore lowers cardiac output.
  • Vilanterol
    Anoro Ellipta, Revinty Ellipta, Relvar Ellipta
    Conditionally Permitted
    Click to expand
    Definition: Bronchodilator
    Information:
    Vilanterol may be used in the treatment of respiratory diseases. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Viloxazine
    Vivalan, Emovit
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    Viloxazine, a morpholine derivative, is a bicyclic antidepressant agent that has been used for the treatment of depression in humans.
  • Warfarin
    Aldocumar, Athrombin, Coumadin, Coumadine, Marevan, Panwarfin, Sofarin, Waran, Warfarin, Warfilone
    Banned
    Click to expand
    Definition: Anticoagulant
    Information:
    Warfarin is an anticoagulant agent that antagonises the effects of vitamin K. It is used in humans for the treatment of a number of conditions, for example, deep vein thrombosis. It was in vogue some time ago for the treatment of navicular disease in horses.
  • Xipamide
    Diurexan, Aquaphor
    Banned
    Click to expand
    Definition: Diuretic
    Information:
    Xipamide is a 'thiazide-like' diuretic agent therefore increases urine output. It is used in humans for the treatment of oedema and hypertension.
  • Xylazine
    Anased, Rompun, Sedaxylan, Sedazine, Xylamax, Xylazine
    Conditionally Permitted
    Click to expand
    Definition: Sedative
    Information:
    Xylazine may be used as a sedative and analgesic. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Xylometazoline
    Otrivine
    Banned
    Click to expand
    Definition: Adrenergic
    Information:
    Xylomethazoline is a sympathomimetic agent used in man for the treatment of nasal congestion. It acts by constricting blood vessels in the nasal mucosa thereby reducing oedema.
  • YK-11
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A selective androgen receptor modulator (SARM) with anabolic activity. It has no legitimate therapeutic indication in the equine athlete
  • Yohimbine
    Yocon, Yocoral, Yohimbine, Yohimex
    Conditionally Permitted
    Click to expand
    Definition: Stimulant
    Information:
    Yohimbine may be used to reverse sedation. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Zeranol
    Ralgro
    Banned
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    Definition: Oestrogen agonist
    Information:
    Zeranol is a non-steroidal oestrogenic growth promoter that has been used to improve weight gain in cattle.
  • Ziconotide (Zicotinide)
    Prialt, SNX111
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    Ziconotide controls chronic and severe pain in humans. It is used as a therapeutic alternative for patients who are intolerant or refractory to other conventional treatments.
  • Zicotinide (Ziconotide)
    Prialt, SNX111
    Banned
    Click to expand
    Definition: Opiod analgesic
    Information:
    Zicotinide controls chronic and severe pain in humans. It is used as a therapeutic alternative for patients who are intolerant or refractory to other conventional treatments.
  • Zilpaterol
    Banned
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    Definition: Beta agonist/repartitioning agent
    Information:
    Zilpaterol is a beta adrenergic agonist that has been used as a performance enhancer for beef cattle.
  • Zimeldine
    Normud, Zelmid
    Banned
    Click to expand
    Definition: Antidepressant
    Information:
    Zimeldine is a serotonin uptake inhibitor that was formerly used for the treatment of depression in humans, but was withdrawn some years ago due to the risk of adverse effects associated with its use.
  • Zolazepam
    Telazol
    Conditionally Permitted
    Click to expand
    Definition: Sedative
    Information:
    Zolazepam is used as a sedative in general anaesthesia. With all medications, a clinical judgment is essential to ensure that the welfare of the horse is never compromised by administering a drug at a time too close to an event such that it may mask symptoms and could aggravate a clinical condition. Horses with locomotor problems in particular must always be provided with adequate rest.

    Horses may not exhibit at an NRHA approved event if they have received any medication classified as a conditionally permitted substance unless they have filed the appropriate Medication Report, to be competition eligible horses must meet all requirements in the current NRHA Handbook under section 8, and in a timely-submitted official Medications Report Form. Please note: Timely filing of the Medications Report Form does not guarantee responsible parties of their responsibility to adhere to NRHA Medication rules.

    Conditionally permitted substances require a 24-hour withdrawal prior to the horse competing.

  • Zoledronate
    Banned
    Click to expand
    Definition: Bone metabolism agent
    Information:
    A bisphosphonate drug used for the treatment of osteoporosis, fractures and hypercalcaemia associated with cancer and Pagets disease. It is considered a risk to equine welfare and has no legitimate therapeutic indication in the equine athlete
  • Zolpidem
    Stilnoct, Hypnogen, Ambien
    Banned
    Click to expand
    Definition: Hypnotic
    Information:
    Zolpidem is a non-benzodiazepine hypnotic agent that acts on the benzodiazepine receptor with a short duration of action. It is used for the short term treatment of insomnia in man. There is evidence that drug dependence occurs in a small number of patients.
  • Zomepirac
    Zomax
    Banned
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    Definition: Non-steroidal anti-inflammatory drug
    Information:
    Zomepirac is a non-steroidal anti-inflammatory drug (NSAID) which was withdrawn from the human market in the early 1980s, due to an association with anaphylactic responses.
  • Zopiclone
    Vivalan, Emovit
    Banned
    Click to expand
    Definition: Hypnotic
    Information:
    Zopiclone is a non-benzodiazepine hypnotic agent which acts on the benzodiazepine receptor with an action of short duration. It is used for the short term treatment of insomnia in humans. There is evidence that drug dependency occurs in a small number of patients.
  • Zuclopenthixol
    Clopixol, Cisordinol
    Banned
    Click to expand
    Definition: Antipsychotic
    Information:
    Zuclopenthixol is an antipsychotic neuroleptic agent used in humans for the treatment of schizophrenia. It is a dopamine D1 and D2 receptor antagonist, and has weak antihistamine effects. It is available in short and long acting formulations.
  • Δ1-Testosterone
    Banned
    Click to expand
    Definition: Anabolic
    Information:
    A synthetic anabolic steroid with no legitimate therapeutic indication in the equine athlete.