Zovirax is used to treat infections caused by herpes viruses, such as genital herpes, cold sores, shingles, and chickenpox. Zovirax will not cure herpes, but it can lessen the symptoms of the infection. Find patient medical information for Acyclovir (Zovirax) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Zovirax (Acyclovir) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. Acyclovir is an antiviral drug. It slows the growth and spread of the herpes virus in the body. Acyclovir will not cure herpes, but it can lessen the symptoms of the infection. Acyclovir is used to treat infections caused by herpes viruses, such as genital herpes, cold sores, shingles, and chicken pox. Acyclovir is an antiviral oral medication used to treat infections caused by the herpes virus, including shingles, chickenpox, and genital herpes. It comes as a tablet, capsule, and liquid suspension. Depending on your condition, you might need to take it by mouth 2 to 5 times a day. Acyclovir works best when you start it as soon as symptoms begin. Medscape - Herpes simplex, zoster-specific dosing for Zovirax (acyclovir), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and. ZOVIRAX is the brand name for acyclovir, a synthetic nucleoside analogue active against herpesviruses. Acyclovir sodium for injection is a sterile lyophilized powder for intravenous.