The World Anti-Doping Agency’s (WADA) Prohibited List is the comprehensive document serving as the international standard for identifying substances and methods prohibited in sport. Mandated by, and serving as a key component of, the Code, the Prohibited List is one of the most important parts of harmonization globally across the anti-doping movement. Broken down by categories, the Prohibited List identifies which substances and methods are prohibited in-competition, out-of-competition, as well as in some cases, by specific sport. The Prohibited List is updated annually following an extensive consultation process facilitated by WADA and goes into effect January 1 of each year. While the WADA Prohibited List is extensive, USADA is here to help clean athletes understand the rules and regulations set forth by WADA. Please use the resources to the right to better understand the WADA Prohibited List.