ZOVICLOVIR 800mg Tablet contains Acyclovir, a potent antiviral medication that works by inhibiting the replication of viral DNA, thereby preventing the spread of the virus in the body. Acyclovir is effective against a variety of viral infections, including herpes simplex, herpes zoster (shingles), and varicella-zoster (chickenpox). By stopping the spread of the virus, ZOVICLOVIR reduces the severity and duration of symptoms, allowing for faster recovery.