Copegus is a brand name for the antiviral medication ribavirin, which is primarily used in the treatment of chronic hepatitis C, a viral infection that affects the liver. 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. Copegus works by interfering with the replication of the hepatitis C virus within the body, helping to reduce the viral load and improve liver function. However, it is not suitable for everyone, including pregnant women, due to potential risks and side effects. These can range from mild symptoms like headache and fatigue to more severe issues such as anemia and mood changes. The use of Copegus requires careful monitoring by healthcare professionals to manage side effects and ensure the best possible outcome for the patient.