[anigbrowl]

I have ADD and a prescription for one of these, and have tried several. Such medications will give you a boost, but if you're not used to them the boost is likely to be offset by unwanted side-effects such a grinding your teeth, stomach cramps etc. Additionally, taking them for a boost rather than ramping up the dose slowly over a few weeks is likely to inflict a rather unpleasant crash when it wears off.

Not to be moralistic about it or anything, but if you are looking for 'superhuman powers' then be prepared for the possibility of feeling like a human punchbag instead.