Don't take more than 1-2, maybe 3 if you wanna get fucked up. You don't need more than say...10-20 mg of the actual painkiller to feel anything. If I were you though stay away from oxy. vicodin's less addictive and you don't build up that much of a tolerance for vics either. i've been taking them for a back problem I got in a motorcycle accident for just shy of a year and 2 pills does me good. also bodyweight is another factor.