narcolepsy
"I like the Nuvigil. My mother takes the Provigil and it works very good for her.  My first day on Nuvigil I was awake and able to make it through the whole day without sleeping, no tiredness in my body or mind.  After about a week I find I am in more control of when I want to sleep.  I have no side effects at all. At first I took it with food then I tried without food I think with food is better because I guess it is absorbed slower.  It is easy to take and I am more productive."