What it is

Valtrex (valacyclovir) is an antiviral drug. It slows the growth and spread of the herpes virus to help the body fight the infection.

What it treats

Valtrex is used to treat infections caused by herpes viruses, including genital herpes, cold sores, and shingles (herpes zoster) in adults. Valtrex is used to treat cold sores in children who are at least 12 years old, or chickenpox in children who are at least 2...