With all the media attention surrounding the Lance Armstrong scandal...?

According to the World Anti-doping Program Beta-Blockers are banned in Billiards and Snooker, there's no specific mention of Pool but it does state WCBS after mentioning Billiards and Snooker, the WCBS does include Pool so I would assume it stands for Pool aswell, here is an excerpt from the document

"Beta-blockers include, but are not limited to, the following:

Acebutolol, alprenolol, atenolol, betaxolol, bisoprolol, bunolol, carteolol,

carvedilol, celiprolol, esmolol, labetalol, levobunolol, metipranolol,

metoprolol, nadolol, oxprenolol, pindolol, propranolol, sotalol, timolol"

There was a player banned in the 80s for the use of propranolol, he was ranked 8th in the world at the time.

Pool is not a sport that requires strength in the traditional sense as it relates to performance enhancing drugs. It can be very taxing mentally during long matches or tournaments which would require a fair amount of rest. It can be physically exhausting because you are on your feet a great deal of time (at least the winners are) and that can also add to your fatigue along with the mental drain and stress of long matches. So no, I wouldn't consider anything by way of any kind of drug that would be of benefit to a pool players game.

your girlfriend is right. adderall would give a big advantage to a pool player. it maximizes focus, concentration, and it also gives you energy to play for hours without mental fatigue.

I don't think there are any, but you could use caffeine if you are sleepy, or sedatives if you are nervous.

This will explain anything you need to know http://www.youtube.com/watch?v=vRJ8k0dNC0g