chronic fatigue syndrome
"I have had chronic fatigue syndrome for over 20 years and it controlled and stole my life.  Nuvigil has given it back to me.  Prior to Nuvigil, I would collapse at around 1 pm and have to sleep around 2-3 hours, then I would have to go to bed by 9 every night.  Now I am living an almost normal life.  I don't need naps and go to bed at 9-10pm and find that my mental alertness is greatly increased (i.e. it seems to counteract "figrofog").  Drawbacks are increased blood pressure and insurance won't cover it."