Depends on how much flow you have to start with I guess. As for side effects - they are there - but they are mild. If I stop taking them then the worst that h

Depends on how much flow you have to start with I guess. As for side effects - they are there - but they are mild. If I stop taking them then the worst that happens is that I want to spend a day napping. But then I'm back to normal. Seriously - withdrawing for caffeine is much worse. Having said that. I don't actually advise that people take them without a prescription. Besides the obvious legal issues - there are people who genuinely need them just to have a reasonably normal life. Black market demand could make them more difficult to obtain for these people (especially me!).