I have had cfs for 22 years and have tried just about everything to get well. I'm now on valcyte my 6th week. I have a sick stomach a lot and feel weak. I also had a very weird rash that developed on my face kneck and upper chest. My legs both developed blisters where the skin was broken and became itchy. I'm hoping that these are signs that something is being evicted from my body. I'm also taking the methylation basic 5 and hope this will help my body deal with the extra burden.