Taribavirin hydrochloride is an orally active inosine monophosphate dehydrogenase inhibitor, has activity against a wide range of viruses, especially the hepatitis C virus and influenza virus. Taribavirin hydrochloride is a Ribavirin proagent, is designed to concentrate within the liver to target HCV-infected hepatocytes while minimizing distribution within red blood cells (RBCs) and the development of hemolytic anemia.