Ribavirin is a non-interferon-inducing, broad spectrum antiviral nucleoside. Ribavirin is reported to be active against RSV, HIV, HCV, and other infectious agents. The compound’s metabolite, ribavirin-5′-phosphate, inhibits inosine monophosphate (IMP) dehydrogenase.A broad spectrum antiviral nucleoside and inhibitor of inosine monophosphate dehydrogenase. Ribavirin is a non-interferon-inducing, broad spectrum antiviral nucleoside. Ribavirin is reported to be active against RSV, HIV, HCV, and other infectious agents. The compound’s metabolite, ribavirin-5′-phosphate, inhibits inosine monophosphate (IMP) dehydrogenase. A broad spectrum antiviral nucleoside and inhibitor of inosine monophosphate dehydrogenase.