Horseracing Integrity & Welfare Unit-HIWU

Knowing the difference between Screening Limits, Thresholds, and Minimum Reporting Levels is important to understanding positive test results. Want to learn more? Watch our video to see how these testing specifications differ and why they matter:

Testing Levels: What Are They and Where Do They Come From? - HIWU Get to know the rationale behind testing and reporting specifications.

Sample collection personnel are the backbone of the Horseracing Integrity and Safety Authority - HISA's Anti-Doping & Medication Control Program. They conduct more than 70,000 sample collection sessions annually in accordance with Program Rules. What training is involved to be able to fill this vital role?

Horseracing Integrity and Safety Authority - HISA's Anti-Doping and Medication Control Program is more than making sure competitors are following the rules; it’s about ensuring that sample collection is conducted professionally in accordance with Program Rules to protect the integrity of the process for all participants.

Did you know that HIWU oversaw more than 6,000 Out-of-Competition (OOC) Sample Collection Sessions in 2025? HIWU's FAQ document answers common questions about OOC Testing, including test selection, regulated substances, the notification process, and more. Review this resource to stay informed: https://www.hiwu.org/education-and-resources/faq-competition-testing

Did you know? HIWU-certified Sample Collection Personnel follow a series of strict protocols to ensure proper hygiene in the test barn and during the sample collection process.

Picogram levels in positive tests are often misunderstood. Watch the video below to explore why it's crucial to look beyond "picograms" when discussing potential violations. https://www.hiwu.org/education-and-resources/what-is-a-picogram

Clenbuterol is permitted only under specific circumstances and requires mandatory reporting through the HISA Portal. For more information, visit: https://www.hiwu.org/education-and-resources/conditions-for-clenbuterol-use-under-hisas-admc-program

Because supplements are not regulated in the same way that drugs are, their safety, effectiveness, and the ingredients present may not be consistent. It's important to conduct due diligence before adding a supplement to your horse's diet. Check out our video below to learn more: https://www.hiwu.org/education-and-resources/whats-the-scoop-on-dietary-supplements

Lasix remains permitted in non-stakes races for horses three and up. It is prohibited in stakes races and races for 2-year-olds. To learn more, view the flyer below.
https://www.hiwu.org/education-and-resources/the-use-of-lasix-under-the-admc-program

Beat the heat! Electrolytes can be a helpful tool to support horses in hot weather. HIWU reminds horsemen and veterinarians of regulations regarding the administration of electrolytes within 48 and 24 hours of a race or Vets’ List workout: https://www.hiwu.org/education-and-resources/HIWU-electrolyte-guidance-062424