To: All Anti-Doping Organizations It has come to WADA’s attention that the black market substance GW501516 is being sold to and used by some athletes.
The side effect of this chemical compound is so serious that WADA is
taking the rare step of warning "cheats” to ensure that there is
complete awareness of the possible health risks to athletes who succumb
to the temptation of using GW501516 for performance enhancement.
GW501516 was a developmental drug that was withdrawn from research by
the pharmaceutical company and terminated when serious toxicities were
discovered in pre-clinical studies.
Clinical approval has not, and will not be given for this substance.
However, GW501516 has been available for some months on the black
market, through the Internet and elsewhere. Anti-Doping authorities have
already seen its use by athletes, as there are a number of positive
Please pass this information on to your athletes as soon as possible