Dan
There are treatments that will alleviate some aspects of CFS, but nothing that will cure it. I can recommend amantadine which helped a friend of mine, but it all depends on the symptoms you have. Amantadine is useful if you have recurrent fevers or have tremors in your hands or all over. But if you have CFS for many years and have different symptoms, other steps need to be taken, and the outlook becomes more difficult. I have had CFS for 18 years and have been through several stages. I would be interested in knowing what stage you or your friend are in.