The supplied 400mg Sofosbuvir Tablets include the following inactive ingredients: colloidal silicon dioxide, croscarmellose sodium, magnesium stearate, mannitol, and microcrystalline cellulose. It is a prescription medicine used with other antiviral medicines to treat chronic (lasting a long time) hepatitis C infection in adults. It is also used in patients with liver cancer and hepatitis C infection who are planning to have a liver transplantation. The 400mg Sofosbuvir tablets are made for use in the various medical ailments.