narcolepsy
"Works great. Took a long time to get it right. I use Nuvigil daily and Ritalin 20mg three times a day. It is sad and depressing but with the right dose and proper nutrition. Things can get better. Bad part is and it's hard to do....stop driving! I can't believe I drove! I am thankful I did not kill someone falling asleep.  How could my loved ones let me drive? Don't drive until you are confident your meds are straight consistently."