Zovirax Cream is a prescription antiviral medication containing acyclovir 5%, used to treat cold sores (herpes labialis) and genital herpes. This topical cream helps reduce symptoms and speed healing when applied at the first sign of an outbreak. The cream should be applied 5 times per day for 4 days, starting as early as possible when symptoms first appear. It is indicated for use in immunocompetent adults and adolescents 12 years and older. Common side effects may include mild pain or stinging at the application site. Store at room temperature. This medication requires a prescription and should only be used under medical supervision.