How much sleep deprivation can SWIY take?

[Nicaine]

How much sleep deprivation can SWIY take before it starts really ruining a roll/run/binge?

SWIM guesses two missed nights in a row is where he really starts feeling like sh*t. Even if he's been eating fairly well. His thinking starts to become scattered/random, sort of like it gets right on the verge of sleep. He starts to forget what he was about to do, or starts an activity and then forgets what he was doing. He's basically not very functional at that point. Continued use of substances is nowhere near as entertaining, and starts turning into a necessity to avoid the crash rather than for enjoyment.

Three missed nights (typically into the 4th day), SWIM starts hallucinating. Usually it starts slowly, with auditory hallucinations (sound like thousands of distant people talking in a giant cafeteria) and seeing flashes of light and constant darting movements in his peripheral vision. He will also "zone out" similar to partial epileptic seizures, i.e. suddenly realize he "wasn't there" for 10 or 15 minutes. Thankfully, SWIM has never progressed beyond this point and has always wised up enough to stop the insanity and go to sleep. It's real easy at that point anyway... just lying down for 2 or 3 minutes is plenty, unless he's seriously tweaked out on something (in which case the "high" has become such a low that even then things are winding down fast).

Anyway, just curious what SWIY's experiences are on this subject. SWIM believes that upwards of 70% of binge-related issues are due to sleep deprivation, with another ~20% due to physical effects of the drug itself and maybe 10% caused by inadequate food intake and miscellaneous factors.