Carl Elliott, who teaches at the Center for Bioethics at the University of Minnesota, has an interesting dispatch on beta blockers (which ease anxiety) and Olympic doping:
One of the most compelling arguments against performance enhancing drugs is that they produce an arms race among competitors, who feel compelled to use the drugs even when they would prefer not to, simply to stay competitive. But this argument falls away if the effects of the drug are distributed so unequally. If it’s only the nervous performers who are helped by beta blockers, there’s no reason for anyone other than nervous performers to use them. And even if everyone did feel compelled to use beta blockers, it’s unlikely that anyone would experience untoward health effects, because beta blockers are safe, cheap, and their effects wear off in a few hours. So unlike users of human growth hormone and steroids, users of beta blockers don’t have to worry about their heads growing or their testicles shrinking. You don’t even have to take them regularly. All you have to do is take a small, 10 mg tablet about an hour before your performance.
The Dish 