Smart Drugs

Every now and then an article comes out praising Provigil for helping you concentrate and get things done. (It also apparently helps you lose weight. I know I would go to the fridge a lot less often if I could only concentrate.)

Many of the writers I know are terrible procrastinators. I'm considered prolific, and I waste heaps of time. So a drug that would help me sit down and get things written, instead of surfing, without making me less creative, or turning me into an newt, etc., sounds pretty magical.

On the other hand, I try to avoid taking drugs on general principle. The human body is an incredibly complex mechanism, and drugs that actually change your personality sound kind of threatening. They could make you a more effective person but would you still be, you know, you?

So this is (as they say on DailyKos, my current time suck) an open thread. What are the facts on smart drugs? Has anyone found them effective? Ineffective? Side effects? Moral issues? Are we all mad not to be taking them?