Provigil, a "wakefulness promoting agent," is banned at the Olympics, even though, probably, it has no effect on physical performance. Despite what the Olympics says, it isn't a stimulant.If Provigil has any effect on a specific athlete's physical performance beyond keeping them awake, I'd argue it was placebo effect. So a drug with a placebo effect is illegal. Fine.But what about the reverse situation: what about giving an actual placebo to an athlete, and telling them it's oh, I don't know, growth hormone? Or Ritalin?