Caffeine in various coffee's/pops does nothing to me. Then again, I make a point of not drinking too much pop or anything else. (I won't deny I love coffee and mountain dew though) I also have had insomnia as long as I can remember, so that does the effect of caffeine a lot for me.
Tbh. theabuseuse of caffeine in this thread is sorta sickening to me. I can't imagine having to stay up for however long. If you get the point where you need to take caffeine to stay awake, you're obviously not getting enough sleep, and obviously have too much to do - neither of which is healthy. Also, energy drinks/pop are extremely un-healthy and I have never understood why people can drink so much of it.
I'm on the little boat that says A: School should start waaaaay later. (Cause really, if you're getting enough sleep, you'll wake up on your own, and don't need an alarm clock) and B: Either less homework period, or more time to do it. Sleep is extremely vital, and today's society seems to not really... take it into consideration, something I despise. But what can you do? /sigh
That's my little opinion on caffeine. *whistles and holds up shield* Go ahead. Flame me.
You're still in high school right? Try staying awake with post-secondary education. I never needed caffeine till I started university.