If you took a good probiotic you could start on the mycoplasma as well as work on the HHV6 at the sametime. I think this is important as with cfs you are always coinfected. I take folinic acid and shark liver oil to reduce the leucoprenia side effects of Valcyte. I also take lots of B vites. But just Valcyte alone did alot for me. For me I started my dosage high and had to stay high.