The Daclatasvir Tablets are used with another antiviral medication (sofosbuvir) to treat chronic (long-lasting) hepatitis C, a viral infection of the liver. Daclatasvir should never be used without sofosbuvir. Daclatasvir and sofosbuvir may also be used with another antiviral medication ( ribavirin ). It is an antiviral medicine used to treat hepatitis C. It will not work for colds, flu, or other viral infections. The Daclatasvir Tablets work by stopping the virus that causes hepatitis C from spreading inside the body.