narcolepsy
"I was put on provigil at the age of 12 and it worked sometimes but I lost Insurance after hitting 18 then was able to get back on it at 20. Now I've been taking for 3 years and going. 2 200 milligrams 1 time when I wake up.some times 3 due to tollarence. I do road construction and operate heavy machines like Bob cats and trucks and rollers but I still fall asleep when we move to next job(not driving) I also use marijuana to help balance the shakes. It works wonders for me. You might just have to bump up dosage. I do this at 50mg plus  until it works. Never went past 600 mg tho. Only bad effect is aloft of aggression and mania list of appetite"