REBETOL is a brand name for the antiviral medication ribavirin, which is primarily used in the treatment of chronic hepatitis C virus (HCV) infection. It is often prescribed in combination with other medications, such as peginterferon alfa-2b or direct-acting antivirals, to enhance the effectiveness of the treatment. REBETOL works by inhibiting the replication of the hepatitis C virus, thereby reducing the viral load in the body. It is available in various forms, including capsules and oral solution, allowing for flexibility in dosing. However, REBETOL is associated with significant side effects, and its use requires careful consideration of the patient's medical history and close monitoring throughout the treatment period. It is contraindicated in certain populations, including pregnant women, due to the risk of serious birth defects.