The components of the drugs are individually not generic and very expensive in the US. Sofusbuvir was discovered in 2007 Sofusbuvir is combined with other drug

The components of the drugs are individually not generic and very expensive in the US. Sofusbuvir was discovered in 2007 Sofusbuvir is combined with other drugs (specifically ledipasvir) because it improves cure rates. Because the individual components are still on patent, prescribing each individually would cost more than prescribing the combo