New Scientist reported that "tests on rats showed that at all doses, the drug rapidly causes cancers in a multitude of organs, including the liver, bladder, stomach, skin, thyroid, tongue, testes, ovaries and womb."[5] In 2013 WADA took 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 GW-501516 for performance enhancement. They stated "clinical approval has not, and will not be given for this substance