you could overdose on caffiene, i think saw a calculator online that allowed you to put your height and weight in and it would estimate in cans of mountain dew how much it would take to kill you. pretty much, unless you got it in some kinda pill or through an IV, it'd be pretty much impossible... you'd be excreteing it before you get enough in you. and you'd probalby have a hard time fitting that much coffee or pop in your stomach without puking.
but because it is a cns stimulant, if you have too much it can cause those things posted 2 posts above. it all depends on how much, how big the person is, how sensitive they are to it. long term i don't think caffiene really has any bad effects (as long as your not taking enough of it to keep you in an overstimulated state), but like anything else, moderation is best. if you need it for a jolt to keep awake, fine, but don't drink absurd amounts if you don't need it.
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shabbat shalom, mother fucker! - the hebrew hammer
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