Valtrex
"Until about age 56, had never had cold sore. Suddenly had spot on butt, went to clinic, PA thought it was spider bite, antibodies given, no relief.  The next time it occurred (same spot), got in to see dermatologist immediately. He stated it was a form of chicken pox virus (not sexual related). Gave Valtrex, worked great. Pharmacist also recommending taking L-LySyine daily to help prevent occurrences. Used to have only 2 occurrences a year - February and August -my work stress months.  Have not had any more occurrences."