Described herein is a combination that includes compound (A) and compound (B), or a pharmaceutically acceptable salt of the foregoing, for ameliorating and/or treating a hepatitis C viral infection.本文描述一種包括化合物(A)及化合物(B)或上述之醫藥上可接受之鹽的組合,其用於改善及/或治療C型肝炎病毒感染。