‘Adderall is a stimulant used to treat Attention Deficit Hyperactivity Disorder. It is banned by the NFL and is considered to be a performance enhancer by the World Anti-Doping Agency (WADA) and the U.S. Anti-Doping Agency (USADA). NFL players can use Adderall for specified medical conditions, but only if they apply for and are granted a therapeutic use exemption. It’s not clear if Oliver has petitioned the league for such an exemption.’