Provigil is basically a neurostimulant. I will be surprised if it helps you long term. It will likely exhaust your brain until you reach a point of fatigue.

Some have tried Ritalin and caffeine and other stimulants. They help short term.

The side-effects of Provigil are troubling. Check out:
http://www.emedicinehealth.com/drug-...article_em.htm

One comment says: This medication may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be alert.

Off label can be problematic because you don't get to see how the med effects a specific condition is a clinical study. Often, there are other conditions that were studied but the med was not found to have a conclusive action.