narcolepsy
"After being diagnosed at age 35, with narcolepsy and REM sleep behavior disorder my ENT put me on Nuvigil 150mg to help me stay awake during the day. I'll tell you what, it didn't do a darn thing. My kids actually said they thought it made me more tired. He then bumped it up to 250mg and I'd say it helped for an hour or so. It gave me horrible headaches, lock jaw and teeth grinding, pretty much no appetite, but the worst part of all had to be how bad it ALWAYS made my stomach hurt and how I felt like I was going to throw up most of the time. It definitely didn't help me and I'd still find myself falling asleep and needing a few naps each day. I also ended up losing 7 lbs in 3 weeks, which wasn't good for me since I'm already very thin."