A solid preparation containing compound (I), wherein the definition of compound (I) is as defined in the description, and pioglitazone, which is useful as a therapeutic drug for diabetes and the like and superior in the dissolution property, chemical stability and dissolution stability, is provided. A solid preparation containing the following first and second parts: (1) the first part containing compound (I) or a salt thereof and, as the first excipient, sugar or sugar alcohol and (2) the second part containing piogl itazone or a salt thereof and, as the second excipient, sugar or sugar alcohol.提供含有化合物(I)及皮利酮(pioglitazone)之固體製劑,其中化合物(I)的定義係如說明書所定義者,該製劑有用於作為糖尿病等之治療藥物且有優越的溶解性質、化學安定性及溶解安定性。固體製劑含有下述之第一部分及第二部分:(1)第一部分含有化合物(I)或其鹽,及作為第一賦形劑之糖或糖醇;以及(2)第二部分含有皮利酮或其鹽,及作為第二賦形劑之糖或糖醇。
