I loved this stuff. Keeps you awake but not edgy for up to a few days at a time.
(this is for info and not medical advice)
http://www.provigilweb.org/Provigil is a drug that keeps you awake. It has legitimate medical uses and is used for performance enhancement by the military for pilots and soldiers in combat situations. Provigil enhances short-term memory and lets users stay awake for extended periods.
http://www.modafinil.com/article/soldiers.htmlU.S. soldiers are staying awake for days and nights on end in Iraq, and many are almost certainly benefiting from military research into pills that let them work for 40 hours straight, without feeling "wired" and without crashing afterward.
Soldiers in past wars have taken stimulants when they can't afford to fall asleep, but these have all had side effects: poor judgment, jumpiness and the need for extra sleep as soon as the soldier stops popping them.
But the new stay-awake pills appear to have no side effects, at least in the short term.
U.S. military studies found that soldiers can stay awake and function alertly for 40 hours, get eight hours of sleep, and then stay awake for 40 more, all without the impaired judgment of old-fashioned uppers.