This has the potential to go very, very wrong. I strongly advise you to consider why you want to do this and examine what would drive you to attempt such a thing. Going without sleep can cause mania/hypo-mania and adding caffeine to the mix can do that too, PLUS may cause cardiac arrhythmias, hallucinations and so on.
"Yes! Live! Life's a banquet and most poor suckers are starving to death!" Auntie Mame