I never saw anything on the wiki about this, but does coffee have a minor secondary effect if you drink too much of it? My vision started getting really shaky at some point, and the only way to fix it was sleep. lol
Yea eventually you'll fall over from exhaustion if you stay up too long drinking coffee. I think you're more likely to get nightmares too, if you keep yourself awake for too long, but not 100% sure just something I felt like was happening in my playthrough.
