Ribavirin 200mg is an antiviral medication primarily used in the treatment of chronic hepatitis C virus (HCV) infection, typically in combination with other antiviral drugs such as interferon. It works by interfering with the virus's ability to replicate, thereby helping the body clear the infection. Ribavirin is also used for some viral hemorrhagic fevers and respiratory syncytial virus infections. It functions by inhibiting viral RNA synthesis and modulating the immune response to combat viral infections. Ribavirin should be taken with food, and patients are advised to stay well hydrated. It requires careful monitoring due to potential side effects.