Ledipasvir antiviral drug molecule. Ledipasvir is an antiviral drug used in the treatment of hepatitis C, usually in combination with one of several other hepatitis drugs. It is an inhibitor of a viral phosphoprotein involved in replication and viral assembly. Atoms are represented as spheres and are colour-coded: carbon (black), hydrogen (white), oxygen (red), nitrogen (blue) and fluorine (green).