narcolepsy
"I have taken Provigil for 5 years now (since I was 16) 400 mgs a day, as the lower dosage was ineffective. It has been a Godsend. I really struggled through school, and whilst it didn't help me get top grades, it did wonders for keeping me awake during lessons. I'm awake for around 15 hours a day, with a 2 hour nap in the afternoon and 7 hours sleep at night. The best part is being able to have a sleep pattern, something which beforehand, I could never experience. Without this drug I couldn't never get anything done."