Excedrin is good if you want to
stay up as long as you can. First of all, it's got a decent quantity of
caffeine, but that's not its only plus. The other
painkillers will keep your stomach irritated so that you couldn't sleep even if you wanted to. If you are just wanting the caffeine to help you think faster or focus, don't take this, try
NoDoz or drink
jolt/
coffee/whatever. I took 3 the other day before school and was
jittering like a maniac and couldn't even feel my own arms.
Oh yeah, and for migraines it kinda works, the pain is still there, but its faded into the background. I find that taking a pair and laying down for 30minutes will have you in a semi-useful state if you need to work or something.