A pharmaceutical composition for treating hepatitis C virus infection, comprising (a) an effective amount of at least one HCV inhibitor selected from the group consisting of an HCV NS3 inhibitor, an HCV NS5B inhibitor, ribavirin, and an IFN- α and (b) an effective amount of an anti-HCV compound of formula (I).本發明係有關於一種治療C型肝炎病毒之醫藥組成物,包括(a)一有效劑量之至少一HCV抑制劑,其係選自由一HCV NS3抑制劑、一HCV NS5B抑制劑、雷巴威林(ribavirin)、以及一干擾素-α(IFN-α)所組成之群組;以及(b)一有效劑量之如式(I)所示之抗HCV化合物。