I've been taking 1 gram of Valtrex now for about 4 months. I'd say overall my energy level increase has been very slight if any but I have noticed my tolerance for light and sound is a bit better. During my last visit my GP told me that he's going to continue to write the script for 1 gram a day for 30 days but told me I could expirement with it. The suggestions were based on the fact that my EBV virus goes in a cyclical type pattern, sometimes active, sometimes not. The suggestions were Continue with 1 gram a day in a 30 day period Stay with 1 gram a day and take a second gram if I am feeling particularly bad Take 1 gram 3x a day for 10 days, off for 20 days. I never had any herx or side effects at 1 gram a day. I took a second one today and it hit me hard. For an hour I was feeling very terrible. My question is this: Since I can only afford 1 gram a day is it better to keep a consistant dose at 1 gram/day or is the 3x for 10 days/20 days off a better idea?