A pharmaceutical composition comprising a compound I of the formula below and an effective amount of suofebuvir is disclosed, wherein suofebuvir is essentially a crystal. A method for using the pharmaceutical composition is also disclosed.公開了包含具有下式的化合物I和有效量的索非布韋的藥物組合物,其中索非布韋基本上是晶體。還公開了所述藥物組合物的使用方法。