> I am not a supporter of study drugs, except for caffeine > problems with these drugs are addiction, side effects, and the phenomenon where you have to take h

> I am not a supporter of study drugs, except for caffeine > problems with these drugs are addiction, side effects, and the phenomenon where you have to take higher doses over time to get the same effect Caffeine is terrible on all these points. I built up such a tolerance in my late teens that I was consuming something like 1000mg/day. The withdrawals were awful when I quit.