The object of the present invention is to provide a stabilized pyrrolidoformamide solid composition. The method for achieving this purpose is a medical solid composition, which comprises (s) ﹣ 1 ﹣ 2 ﹣ hydroxyethyl) ﹣ 4 ﹣ methyl ﹣ n ﹣ n ﹣ 4 ﹣ methyl ﹣ phenyl ﹣ 5 ﹣ 2 ﹣ trifluoromethyl) phenyl ﹣ 1H ﹣ pyrrole ﹣ 3 ﹣ formamide and suitable additives.本發明的目的是提供一種穩定化的吡咯甲酰胺的固體組合物。實現該目的的方式是一種醫藥用固體組合物,其包含(S)‑1‑(2‑羥乙基)‑4‑甲基‑N‑[4‑(甲基磺酰基)苯基]‑5‑[2‑(三氟甲基)苯基]‑1H‑吡咯‑3‑甲酰胺以及合適的添加劑。