USADA announced today that Isabella Winkler, of Seattle, Wash., an athlete in the sport of boxing, has accepted a six-month period of ineligibility for an anti-doping rule violation after testing positive for a prohibited substance.
Winkler, 25, tested positive for propylhexedrine as the result of a urine sample collected at the 2024 USA Boxing National Championships on December 21, 2024. Propylhexedrine is a Specified Substance in the class of Stimulants and is prohibited in-competition under the USADA Protocol for Olympic and Paralympic Movement Testing, the United States Olympic and Paralympic Committee National Anti-Doping Policies, and the World Boxing Anti-Doping Rules, all of which have adopted the World Anti-Doping Code and the World Anti-Doping Agency (WADA) Prohibited List.
After investigating, USADA determined that Winkler was using an over-the-counter medication containing propylhexedrine, but she lacked a valid Therapeutic Use Exemption (TUE). Under the USADA TUE Policy, an athlete has the responsibility to demonstrate that the therapeutic need to treat an acute or chronic medical condition satisfies the strict criteria within the WADA International Standard for TUEs (ISTUE).
Winkler’s six-month period of ineligibility began on February 26, 2025, the date she accepted a provisional suspension. In addition, Winkler has been disqualified from all competitive results obtained on and subsequent to December 21, 2024, the date her positive sample was collected, including forfeiture of any medals, points and prizes.
In an effort to aid athletes, as well as support team members such as parents and coaches, in understanding the rules applicable to them, USADA provides comprehensive instruction on its website on the testing process and prohibited substances, how to file and update athlete Whereabouts, how to obtain permission to use a necessary medication, and the risks and dangers of taking supplements, as well as performance-enhancing and recreational drugs.
In addition, USADA manages a drug reference hotline, Global Drug Reference Online (GlobalDRO.com), conducts educational sessions with National Governing Bodies and their athletes, and distributes a multitude of educational materials, such as a supplement guide, a nutrition guide, a clean sport handbook, and periodic alerts and advisories.
USADA makes available a number of ways to report the abuse of performance-enhancing drugs in sport in an effort to protect clean athletes and promote clean competition. Any tip can be reported using the USADA Play Clean Tip Center, by text at 87232 (“USADA”), by email at playclean@USADA.org, by phone at 1-877-Play Clean (1-877-752-9253) or by mail.
USADA is responsible for the testing and results management process for athletes in the U.S. Olympic and Paralympic Movement and is equally dedicated to preserving the integrity of sport through research initiatives and educational programs.
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