I was diagnosed with OSA and put on a CPAP machine four months ago. I have managed to lose a little weight, but still feel completely exhausted. I use the CPAP all night every night thanks to my wife's insistence. At this point I feel just as tired as ever during the day, even had to pull over during the day to take a nap last week. I work as an estimator and manager for a roofing company, and work a long day every day monday to friday. I have an appoinment with my pulmonary doctor in october, should I ask him about provigil. How has it worked for some of you. I am new to treatment for a sleep disorder, but right now I feel just as worn out as before I started with the CPAP