Amantadine worked for ahwile for me but it also made my muscles very tense. Provigil didn't work. So I have been on Ritalin for about 5 years now. I also didn't think I had sleep apnea but after a sleep study I found out I did. My C-PAP really helps me with my sleep which just gives me a sounder sleep. I can't say that my fatigue is that much better. I even use the CPAP when I take a nap. I really missed it when our electricity was out for 3 days when the midwest was hit by so many wind starms after Hurricane IKE hit.