My neuro first put me onto Provigil for that nasty fatigue. By 4pm, I couldn't think straight, couldn't get anything done... so... on I went to Provigil. I felt good and had energy and could think.
For about three days. Then I was back to my original, tired-out state. So...
My neuro switched me to Amantadine. I take 300mg per day. I rarely get the nasty fatigue now. Sometimes I get a little slow but can recover and move on.
But, all the meds affect everyone differently. What one drug will work like a charm for one patient, won't for another. You just have to try it. Keep in close contact with your doctor about your progress. Keep a diary.
I wish you luck and hope that you can quiet the fatigue down.