One 200 mg pill snorted at once will give me a moderate rush. I dont take much caffeine like coffeee or ECA junkies though it would probably take them more to get the same thing. I cut up the caffeine and make individual lines with them and do them one line at a time and it works well. I think that oe of the reasons this works well is the caffeine is crushed up a lot so it absorbs faster than a whole pill.