narcolepsy
"I'm 25 years old and have had narcolepsy since I was around 10. I've never been on any medication before and have lived my life around constant daytime sleepiness and having to take regular naps. My Dr prescribed me Nuvigil. Day one was the greatest I have ever felt in 15 some odd years! I have energy to do things, can eat without having to sleep afterwards, can stay awake at work. Still randomly after being up for a excessive period of time I get the urge to take a nap and if I do so, I have no issues. Bad side effects are mild headaches, slight tightening of the chest. Bad thing is my insurance only covers a small portion of it and most likely wont be able to afford it."