The present inventions related to new pharmaceutical solid tablet and capsule formulations which used the HCV polymerase inhibitor 4-amino-1-((2R,3R,4R,5R)-3-fluoro-4-hydroxy-5-hydroxymethyl-3-methyl-tetrahydro-furan-2-yl)-1H-pyrimidin-2-one (Ia).本發明係關於一種使用HCV聚合酶抑制劑4-胺基-1-((2R,3R,4R,5R)-3-氟-4-羥基-5-羥甲基-3-甲基-四氫呋喃-2-基)-1H-嘧啶-2-酮(Ia)之新穎醫藥固體錠劑及膠囊調配物。(無元件符號說明)