Hi all. I am having a problem and need your advice. I was really recovering after 17 yrs of CFS but my ALT keeps going up every 2 months on the Valcyte dose I need (450 mg daily) so Dr. Lerner reduses my dose to 450 mg every 48 hrs. About 2 weeks after reducing the dose, I become very sick again. Dr. Lerner says the drug has been known to cause liver cancer so he has to be very careful. However, the doctor I saw before him, Dr. Leo Galland, felt that mild ALT elevation was OK. Do you know anything I can take (supplements, etc.) that may prevent the ALT from rising? I already take NAC. Kelly...if you are reading this, you mentioned that you take that Artemisinin supplement...would you kindly tell me the name of it and where you buy it from again? I really appreciate it. Also, do you think it is helping you? I think I will take it in addition to the Valcyte.... this SUX!!!!!