I posted on provigil a few months ago. Day one, great! perfect! Beautiful day, like on steroids. Day two, okay, still beautiful, not as strong. Day three, beautiful, but not lasting as long. Day four. A little like taking nothing. Day five, tookit and fell into beautiful sleep all day. Day six, does nothing. Everyday after, did nothing.
Couldn't get medcare to pay for script without prior authorizaiton and it didn't seem worth it. Did get some burning in the kidneys toard the end few days, but I'm a mess with meds. Its a dopamnie reuptake inhibitor or something to do with dopamine. It might be a problem for people with some conditions that deal with dopamine. I do better on the epinephrine ones, but this is less hard on my liver. I think its a good option, but I just got a tolerance really fast to it.
Lots of people really love it and if it wasn't such a battle, I'd get it refilled. My boyfriend was put on it and he didn't notice a thing on the maximum dose ad just slept all day! But then, he's impossible anyway!