narcolepsy
"Love this medication! Have been on it for over 10 years with no side effects. Different insurance companies have made me try Ritalin, Adderall and Nuvigil. None of those worked and the first two gave me awful side effects. It is not a fix all! You have to live different than other people do if you have narcolepsy. My doctor (who wrote a book on narcolepsy) said that I should still get about 10 hours sleep every night and should have a consistent daily schedule. Be properly diagnosed by a sleep latency study after an assessment for sleep apnea - it doesn't help sleep apnea! And don't take it if you are pregnant (also, birth control pills may not work while on it)."