PROBLEM TO BE SOLVED: To provide a pharmaceutical composition containing herbal medicine or the like having excellent storage stability, and a storage stabilizer and a stabilizing method of a pharmaceutical composition containing herbal medicine or the like.SOLUTION: A pharmaceutical composition contains the following components (A) and (B): (A) one or more selected from the following components (A-4) and (A-5), (A-4) Japanese prickly ash or extracts thereof and (A-5) Horse-chestnut seed or extracts thereof； and (B) Loxoprofen or salts thereof.SELECTED DRAWING: None【課題】保存安定性に優れた生薬等含有医薬組成物、並びに生薬等含有医薬組成物の保存安定化剤及び安定化方法の提供。【解決手段】次の成分（Ａ）及び（Ｂ）：（Ａ）次の成分（Ａ－４）及び（Ａ－５）から選ばれる１種以上 （Ａ－４）サンショウ又はその抽出物 （Ａ－５）セイヨウトチノキ種子又はその抽出物（Ｂ）ロキソプロフェン又はその塩を含有する医薬組成物。【選択図】なし
