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HIWU oversees testing, educating stakeholders on the ADMC Program, accrediting laboratories, investigating potential violations, and prosecuting any such violations

The Horseracing Integrity & Welfare Unit (HIWU) is the independent enforcement agency of the Horseracing Integrity and Safety Authority’s Anti-Doping and Medication Control (ADMC) Program

Substances

HISA Controlled & Banned Substances Lookup

Cases

Latest Resolutions

Date of ResolutionCovered personCovered horseStatus
Date of Resolution6/15/2026Covered personGerald BennettCovered horseChrome GhostStatus
Date of Resolution6/15/2026Covered personGerald BennettCovered horseNaughty RascalStatus
Date of Resolution6/12/2026Covered personRene CazaresCovered horseMiss GoodbarStatus

News

Latest News and Developments from the Horseracing Integrity & Welfare Unit in the Thoroughbred Industry.

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Announcements

Michelle Pujals Retires as General Counsel; Janelle L. Winston Named Successor

The Horseracing Integrity & Welfare Unit (HIWU) announced today that Michelle Pujals has retired as the organization’s general counsel after serving four years in the position. HIWU has named Janelle L. Winston as Pujals’ successor, effective immediately. Pujals joined HIWU after spending 20 years with the National Basketball Association’s (NBA) legal department, where she oversaw the development and administration of anti-drug programs for NBA players, coaches, and trainers. She was a member of the NBA/National Basketball Players Association Prohibited Substances Committee and the NBA Crisis Management Team. “Michelle has been a key leader for the HIWU team since we were established in 2022,” said Ben Mosier, executive director of HIWU. “She has played an instrumental part in the buildout of HIWU and the Anti-Doping and Medication Control (ADMC) Program and ensuring that the Rules are applied and enforced correctly and consistently. “HIWU will miss the unwavering commitment to integrity and fairness that Michelle brought to her role each day.” Winston joins HIWU as general counsel after spending nearly a decade as counsel for the National Football League (NFL), where she administered its policies on substances of abuse and performance-enhancing substances. She also represented the NFL and its Member Clubs in labor-management disputes, conducted trainings for coaches and players on adherence to the NFL’s personal conduct and gambling policies, and served as a board member for the Partnership for Clean Competition. Earlier in her career, Winston was senior labor relations counsel at the Metropolitan Transportation Authority - New York City Transit, where she supervised labor attorneys, advised leadership on disciplinary matters, and delivered comprehensive counsel to hearing officers and labor relations teams. Winston has served as an adjunct professor at Fordham School of Law since 2007, where she teaches Fundamental Lawyering Skills. “Janelle has long worked with Drug Free Sport International, HIWU’s parent company, through her work at the NFL, and she brings extensive experience in both anti-doping matters and legal leadership to our team,” said Mosier. “We are excited for her to dive in and positively affect the future of the Program.” “I am thrilled to join HIWU at such an exciting time,” said Winston. “Coming from the NFL, I understand what it means to protect the integrity of a sport that millions of fans hold dear — and I bring that same sense of duty to this new role. I'll admit, after years in professional football, I never imagined I'd find athletes bigger than NFL linemen, but here we are, and I could not be more humbled or energized by the challenge ahead.” About the Horseracing Integrity & Welfare Unit The Horseracing Integrity & Welfare Unit (HIWU) was established in 2022 by Drug Free Sport International to administer the rules and enforcement mechanisms of the Horseracing Integrity and Safety Authority’s (HISA) Anti-Doping and Medication Control (ADMC) Program. The ADMC Program established a centralized testing and results management process that applies uniform penalties for violations efficiently and consistently across all American Thoroughbred racing jurisdictions that HISA governs. As the enforcement agency of the ADMC Program, HIWU oversees all testing processes, including the selection of horses to be tested, training of sample collection personnel, and chain-of-custody procedures. Additionally, HIWU is charged with industry/stakeholder education, laboratory accreditation, results management and adjudication, and investigations. For more information, please visit hiwu.org. Contact: Alexa Ravit, HIWU Director of Communications & Outreach  (816) 516-9572  aravit@hiwu.org 

HIWU announced today that Michelle Pujals has retired as the organization’s general counsel after serving four years in the position. HIWU has named Janelle L. Winston as Pujals’ successor, effective immediately.

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Yunnan Paiyao - New Cover
Outreach

Horsemen’s Advisory: Yunnan Baiyao / Yunnan Paiyao (1)

Horsemen’s Advisory: Yunnan Baiyao / Yunnan Paiyao Following up on an advisory distributed in January 2024, HIWU strongly advises horsemen to dispose of any variations of the herbal products that may be identified on the labels as Yunnan Paiyao, Yunnan Baiyao, and/or Baiyao. HIWU continues to find these supplements during searches despite the risks associated with them. In testing various forms of these products, which are manufactured in the United States and abroad, both Banned Substances (e.g., boldione, glaucine, higenamine, and adenosine monophosphate) and Controlled Medications (e.g., ephedrine) have been reported in analyzed samples despite not being listed on the ingredient labels. Continued use of these products may put horsemen at risk of a positive test. As a reminder, supplements manufactured in the United States or elsewhere are not regulated by the United States Food and Drug Administration; horsemen and veterinarians use them at their own risk. Additional resources are available on the HIWU website: Dietary Supplements- What You Should Know What's the Scoop on Dietary Supplements? By applying caution and conducting due diligence before purchasing or using dietary supplements, horsemen can ensure that they are doing their best to minimize the risk of unintentionally exposing their horses to Prohibited Substances. For questions or to get in touch with HIWU’s Science team, please contact sciencesupport@hiwu.org.

Following up on an advisory distributed in January 2024, HIWU strongly advises horsemen to dispose of any variations of the herbal products that may be identified on the labels as Yunnan Paiyao, Yunnan Baiyao, and/or Baiyao. HIWU continues to find these supplements during searches despite the risks associated with them.

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EasyWillow Label - Cover
Outreach

Horsemen’s Advisory: Conducting Due Diligence on Dietary Supplement Products

In recent months, HIWU has adjudicated multiple cases under HISA's Anti-Doping and Medication Control (ADMC) Program in relation to the dietary supplement Easywillow. Easywillow’s ingredient label lists Kava Kava, which is an explicitly named S0 Banned Substance under its other names, Kava and Piper Methysticum. As a courtesy to horsemen and veterinarians, please be reminded of regulations and resources regarding the use of dietary supplements: While the ADMC Program does permit the possession and use of dietary supplements such as vitamins, minerals, herbs, and homeopathic products, horsemen and veterinarians use these products at their own risk. Dietary supplements manufactured in the United States or elsewhere are not regulated or evaluated by the FDA for safety, purity, stability, potency, or efficacy prior to their sale. HISA and HIWU do not approve, certify, or endorse dietary supplements or other feed products as being permitted under the ADMC Program. However, HIWU offers resources for horsemen and veterinarians to help them feel more confident in the products that they give to their horses: - HIWU’s substance lookup tool, available at hiwu.org or via the HIWU app, can be used to search for individual ingredients listed on a product’s label; supplement product names are not included. - Horsemen and veterinarians should be aware that the absence of a specific ingredient name in the lookup tool / on the Prohibited List does not guarantee that the ingredient is not a Prohibited Substance. For example, Prohibited Substances like Kava Kava may go by or be sold under multiple names. HIWU continually updates the lookup tool to reflect new substance names but cannot guarantee that the tool is exhaustive of every possible option. - When in doubt, HIWU’s Science team can confirm whether or not a product’s ingredient label lists any Prohibited Substances. Please note that HIWU’s confirmation of the absence of Prohibited Substances on the label does not guarantee the absence of Prohibited Substances in the product itself, for HIWU has sent supplements for testing that came back positive for Prohibited Substances that were not listed on the label. Additional resources are available on the HIWU website: Dietary Supplements- What You Should Know What's the Scoop on Dietary Supplements? By applying caution and conducting due diligence before purchasing or using dietary supplements, horsemen can ensure that they are doing their best to minimize the risk of unintentionally exposing their horses to Prohibited Substances. For questions or to get in touch with HIWU’s Science team, please contact sciencesupport@hiwu.org

HIWU has adjudicated multiple cases under HISA's Anti-Doping and Medication Control (ADMC) Program in relation to the dietary supplement Easywillow. Easywillow’s ingredient label lists Kava Kava, which is an explicitly named S0 Banned Substance under its other names, Kava and Piper Methysticum.

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