Name a commonly used antiviral for the treatment of herpes simplex virus.

Acyclovir is a widely used antiviral medication specifically designed to treat infections caused by certain viruses, particularly herpes simplex virus (HSV). It works by inhibiting the viral DNA synthesis, halting the replication process of the virus. This is crucial in managing herpes simplex infections, which include cold sores and genital herpes, by reducing the severity and duration of outbreaks, as well as helping prevent future outbreaks in some patients.

Ribavirin is primarily used to treat hepatitis C and some viral hemorrhagic fevers. Tenofovir is an antiviral medication typically used for HIV and hepatitis B infections, working by inhibiting reverse transcriptase. Oseltamivir is an antiviral used to treat influenza viruses by inhibiting neuraminidase, an enzyme important for viral replication and spread. Each of these medications targets different viruses and mechanisms, which highlights the specific role of acyclovir in the management of herpes simplex infections.