i took 3 and a half vivarin (200mgs each) once and i was awake for 46 hours
it fucking sucked balls. worst 46 hours of my life. i felt wicked sick the entire time and i couldnt throw them up, it just wouldn't happen. i was fine for about 3 hours after i took them, but once i slowed down and such, i started feeling super sick.
caffeine is not a good thing