Originally Posted By: NAro
"A flight simulation task was chosen for the assessment of the stimulants in a counter-balanced, within-subject design under four different conditions: baseline (no drugs), placebo, caffeine (200 mg), and modafinil (200 mg). The equal effectiveness of both drugs in abolishing the nocturnal drop in cognitive performance...."


I find that Provigil has far fewer side-effects, for me, than caffeine does, such as nervousness and edginess, irritability, fine muscle tremors, and dyspepsia. I also find that I can return to sleep when the opportunity presents when on Provigil, but not when on caffeine. YMMV

Jeff