obstructive sleep apnea/hypopnea syndrome
"This is my second day on Provigil 200mg once a day and was hoping for a dramatic change but there was none.  I have sleep apnea and CPAP was not enough.  Passed out at work and not safe to drive.  I can say I am a little more clear and not in sleepy fog.  Hoping that it will get better or up my dose"