narcolepsy
"I was diagnosed with Narcolepsy about 2 weeks ago. For 2 months I had been nodding off at work and at home, it got really bad when I nodded off while at a stoplight driving and when I got "written" up for sleeping at work. I was given Provigil to help me out which when I started taking it, it was like a miracle drug. I felt alert and not drowsy all the time. After 5 days I started feeling nauseous and then 2 days later out of the blue it stopped working. My Doctor put me on Ritalin but I'm still having problems later in the day, on my way to see a sleep specialist."