A gram would suffice.

....stop snorting fucking pills. Please. Snorting blow is dumb, snorting glass is dumb...but snorting pills is on a whole new level of dumb. -_- There are fillers and binders in pills that probably shouldn't go up one's nose...plus, half the shit out there isn't even water soluble...meaning, it won't hit you any different than just swallowing it. :-\