I'm glad I could do that for you, but PEDs are no joke. If you scroll down, I provide a source that contains three reasons why marijuana is (justly) classified as a PED. I'll paste it again for your convenience:
Cannabis is considered to be in violation of all three main disqualifying criteria. It violates the first (performance enhancement) because of its ability to decrease anxiety and fear, and potentially to improve some types of oxygenation and concentration. It violates the second (health risk) because it can result in, among other things, "decreased cognitive performance" and "pulmonary toxicity." It violates the third (spirit of sport) because of the drug's widespread illegality and conflicts with the "role model of athletes in modern society," along with "negative reactions by the public, sponsors, and the media."