multiple sclerosis
"I take Provigil about 5 times a week. I have been on it since 12/06. I have to take "vacations" from it in order for it to work like it should. When I start it again, I get massive headaches but is worth it for the energy. My MS fatigue is so bad most of the time that I really need this medication. I do get headaches, nervousness, anxiety, and stomach issues while taking this pill. But all I do without taking it, is sleep."