Valacyclovir

Valacyclovir is an antiviral medicine used to treat infections caused by certain herpes viruses. It is a prodrug of acyclovir, which means the body converts it into the active medicine after you take it. It works by slowing the virus’s ability to multiply, helping the infection clear and reducing symptoms.

It is commonly prescribed for cold sores, genital herpes, and shingles, and may also be used to help prevent outbreaks in some people. Valacyclovir does not cure herpes infections, and it works best when started early. Tell your healthcare provider if you have kidney problems, are pregnant, or take other medicines that affect the kidneys.