HIWU’s Guide for Vets and Horsemen 

February 21, 2024

HIWU Informational Release

The Horseracing Integrity & Welfare Unit (HIWU) released a guide for veterinarians and horsemen on published Detection Times and Screening Limits of common Controlled Medications.

Under HISA’s Anti-Doping and Medication Control (ADMC) Program, it is the responsibility of attending veterinarians and Responsible Persons, i.e., trainers, to determine appropriate withdrawal guidance for a substance administered to a Covered Horse based on factors including, but not limited to, that individual horse’s health and metabolism, other prescribed medications the horse may be receiving, a veterinarian’s and/or trainer’s risk aversion level, and published Detection Times. 

The attached table should be consulted as a guide when determining appropriate withdrawal guidance for the medications listed. 

Empty boxes indicate that there is not information available regarding dosing protocol, Detection Time, or Screening Limit for that specific substance. 

All administrations of Controlled Medication Substances are prohibited within 48 hours of a race (restricted administration time), with the following exceptions as per HISA’s ADMC Program Prohibited List. These substances may be administered ≥24 hours before a race or Vets’ List workout: 

  • Orally administered vitamins 
  • Vaccines 
  • Anti-ulcer medications (e.g., Cimetidine, Omeprazole, and Ranitidine) 
  • Unsupplemented isotonic electrolyte solutions by oral or IV administration 
  • Altrenogest in female horses 
  • Antimicrobials (antibiotics) and other anti-infective agents, excluding procaine penicillin or other antimicrobial/anti-infective agents containing or metabolizing to Prohibited Substances 
  • Antiparasitic/anthelmintics approved and registered for use in horses, excluding levamisole or other antiparasitic/anthelmintics metabolizing to and/or containing other Prohibited Substances 

Click to download Controlled Medication Table

Great article by @Pastthewire

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