Cold sores are painful and oozing, and they always seem to appear before that wedding or class reunion. Also called fever blisters, the small, fluid-filled lesions typically form near or on your lips ...

Valtrex (valacyclovir hydrochloride) is a prescription antiviral drug that can shorten the duration of cold sores, genital herpes, and shingles. It may cause mild side effects in some people. Valtrex ...