Sofosbuvir is an antiviral medication used to treat chronic hepatitis C, a viral infection that affects the liver. It works by inhibiting a specific enzyme that the virus needs to replicate, helping to reduce the amount of virus in the body. Sofosbuvir is often used in combination with other antiviral drugs to improve treatment effectiveness. Approved by the U.S. Food and Drug Administration (FDA) in 2013, Sofosbuvir has significantly changed the landscape of hepatitis C treatment. It is taken orally, usually once a day, and has a high cure rate, making it a preferred option for many patients.