narcolepsy
"Originally I tried provigil. Nuvigil wasn't available yet. Loved it at first but as my body adjusted in my ignorance, I got nervous. I stopped. I had to deal with it. About 12 years later I tried again. This time I read more and I asked lots of questions. 
I am a new person. I am so grateful for nuvigil!!
What I've learned (I am not an MD)
Start out with a low dose. Half pills are fine. (Do not exceed 250 mg unless dr prescribed). Your body may be adjusting not building tolerance for a year or 2. Take each week at a time
Naps still necessary; My naps are only about 30 min instead of 2 hrs but very refreshing
Take a day or 2 off every week or 2. Makes a huge difference!
Awesome insurance helps a lot! $5 per 30"