I took Famciclovir for over a year 500 mg 3 a day. My reactived EBV,CMV, HHV6,HHV7 HAS NOT IMPROVED. I have been taking Valacyclovir 1GM 3 a day for a week. Can't hardly stay awake feel like I got ran over by who knows what!!!! Extreme headache,sore throat, hard to breathe. Has anyone else had this? If so what did you do?