Sofosbuvir is a medication used in the treatment of chronic hepatitis C virus (HCV) infection. It belongs to a class of drugs called direct-acting antivirals (DAAs).

Sofosbuvir works by interfering with the replication process of the hepatitis C virus, ultimately preventing it from multiplying and spreading in the body. It is typically used in combination with other antiviral medications, such as ribavirin or velpatasvir, to achieve higher cure rates.