Hello all, I've checked other posts though I'm sure this has been discussed. I recently added valacyclovir to my ME/CFS medication line up and since then I've lost weight (unwanted, I'm already underweight due to the ME/CFS itself) and feeling a lot of general abdominal discomfort and nausea though I haven't vomited, I've felt like I will. Is this is a common side effect of valacyclovir? I've taken it before for my ME/CFS but it's been so long I don't remember this. I was taking 1 g/day but now taking 1 g every other day to see if that helps.