In recent months, HIWU has been informed of the reported use of N-Butyl-Alcohol, which may be sold under product names such as Clotol, Clot All, Butanol, or N-Butyl-Alcohol.
Horsemen should be aware that N-Butyl-Alcohol meets the criteria of an S0 Banned Substance under HISA’s Anti-Doping and Medication Control (ADMC) Program because it is not FDA-approved for use in any species and does not have a valid veterinary use in the horse. It is therefore a Banned Substance. The intravenous administration of large doses of N-Butyl-Alcohol may also compromise horse welfare.
This substance will be formally added to HISA’s Prohibited List as a Banned Substance in the next iteration of the ADMC Program Rules. In the interim, Covered Persons should dispose of any products containing N-Butyl-Alcohol immediately to avoid future potential Anti-Doping Rule Violations, which will be enforced starting in January 2026.
As a reminder, the Presence, Use, Administration, Possession, or Trafficking of any Banned Substance is subject to a period of Ineligibility of up to two years, a fine of up to $25,000, the disqualification of race results (as applicable), and public disclosure.
Horsemen or veterinarians with questions should reach out to sciencesupport@hiwu.org.