Generic Zovirax is an antiviral drug. It slows the growth and spread of the herpes virus so that the body can fight off the infection. Acyclovir will not cure herpes, but it can lessen the symptoms of the infection. Acyclovir is used to treat infections caused by herpes viruses. Illnesses caused by herpes viruses include genital herpes, cold sores, shingles, and chicken pox.

Zovirax - ophthalmic ointment is used for the treatment of herpes simplex virus infections of the eye. Aciclovir (the active ingredient in Zovirax ophthalmic ointment) belongs to a group of medicines called anti-virals. It works by stopping the production of the herpes simplex virus. Note, this ointment does not help to get rid of the virus from your body and is only suitable for use in the eye.