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 may also be used for purposes not listed in this medication guide.
Sitavig (acyclovir) is a prescription drug, which is used to treat Herpes labialis, or cold sores (around the mouth), caused by the herpes virus. Sitavig contains an ingredient, acyclovir, which is antiviral in nature and works by stopping the spread of the herpes virus; it decreases the pain and gives instant relief from cold sore symptoms and speeds up recovery.