I notice as the day progresses and the evening time approaches, I develop severe headaches to where I cannot function. Recently, I tried 600mg of Ibuprofen and it didn't work. I also tried to sleep the headache away, but woke up with my head still pounding. I do not wish to stop taking the Provigil because it is a great help to me as a full time mom, full time worker, and PhD student. I desperately need my energy and alertness.