The present invention intends to provide a solid preparation which contains an insulin sensitizer and an active ingredient other than an insulin sensitizer, and exhibits dissolution behavior of an insulin sensitizer similar to that of an insulin sensitizer from 〝a solid preparation containing only an insulin sensitizer as an active ingredient〞. The solid preparation comprises 〝a part containing coated particles in which the particles containing an insulin sensitizer are coated with lactose or a sugar alcohol〞 and 〝a part containing an active ingredient other than an insulin sensitizer〞.本發明的目的係提供一種固體製劑，該固體製劑含有胰島素增敏劑及胰島素增敏劑之外的活性成分，並且顯示胰島素增敏劑的溶出行為近似於由「僅含有胰島素增敏劑作為活性成分之固體製劑」的胰島素增敏劑之溶出行為。該固體製劑包括「含有其中包含胰島素增敏劑的粒子係經乳糖或糖醇包覆之包覆粒子的部分」以及「含有胰島素增敏劑之外的活性成分的部分」。
