Valacyclovir is used to treat cold sores (herpes labialis), shingles (herpes zoster), and genital herpes. It is also used to control genital herpes outbreak in patients with human immunodeficiency virus-1 (HIV-1). VALACYCLOVIR (val ay SYE kloe veer) helps manage infections, such as cold sores, genital herpes, shingles, and chickenpox, caused by viruses. It will not treat colds, the flu, or infections caused by bacteria. Overview: Valacyclovir is an antiviral medicine used to treat conditions such as cold sores, genital herpes, shingles, and chickenpox. It works by stopping the growth of herpes viruses. Common. Valaciclovir, also spelled valacyclovir, is an antiviral medication used to treat outbreaks of herpes simplex or herpes zoster (shingles). [2] It is also used to prevent cytomegalovirus following a kidney transplant in high risk cases. [2] Detailed Valacyclovir dosage information for adults and children. Includes dosages for Herpes Simplex Labialis, Herpes Simplex - Suppression, Herpes Zoster and more; plus renal, liver and dialysis adjustments. Valacyclovir (Valtrex) is an antiviral medication used for treating infections caused by herpes simplex virus and varicella zoster virus, such as cold sores, genital herpes, and shingles, and chickenpox. Medscape - Herpes simplex, zoster-specific dosing for Valtrex (valacyclovir), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and. Valacyclovir is an antiviral drug. It slows the growth and spread of the herpes virus to help the body fight the infection. Valacyclovir is used to treat infections caused by herpes viruses, including genital herpes, cold sores, and shingles (herpes zoster) in adults. Valacyclovir is used to treat infections caused by certain types of viruses. Learn about side effects, drug interactions, dosages, warnings, and more. Valacyclovir oral tablet is a prescription medication used to treat or prevent infections caused by the herpes simplex virus. These include cold sores, genital herpes, chickenpox, and shingles.