Zovirax is a brand name of Acyclovir, an antiviral medication used to treat viral infections such as cold sores, genital herpes, and shingles. It is available in many countries under different brand names, such as Aciclovir, Acivir, Cyclovex, Zovir, and Herperax. These brand names all contain the same active ingredient as Zovirax and work similarly to treat viral infections. Generic versions of Acyclovir are also available under various names, including Acyclovir Cream and Acyclovir Sodium Injection. It is always recommended to consult with a healthcare professional to determine the best treatment option for any viral infection.