PROBLEM TO BE SOLVED: To provide a composition for external application that contains pyrroloquinolinequinone or a salt thereof, the composition exhibiting excellent stability of pyrroloquinolinequinone or a salt thereof.SOLUTION: A composition for external application contains (a) pyrroloquinolinequinone or a salt thereof and (b) at least one substance that is selected from the group consisting of (i) tranexamic acid, derivatives thereof and salts of tranexamic acid or the derivatives, (ii) hydroquinone, derivatives thereof and salts of hydroquinone or the derivatives, (iii) polyoxyalkylene alkyl glucosides, (iv) acetylated hyaluronic acid and salts thereof and (v) natural water-soluble polymers, derivatives thereof and salts of natural water-soluble polymers or the derivatives.COPYRIGHT: (C)2014,JPO&INPIT【課題】ピロロキノリンキノン又はその塩を含む外用組成物であって、ピロロキノリンキノン又はその塩の安定性に優れる組成物を提供する。【解決手段】(a)ピロロキノリンキノン又はその塩、並びに(b)(i)トラネキサム酸、その誘導体、又はそれらの塩、(ii)ハイドロキノン、その誘導体、又はそれらの塩、(iii)ポリオキシアルキレンアルキルグルコシド、(iv)アセチル化ヒアルロン酸又はその塩、及び(v)天然水溶性高分子、その誘導体、又はそれらの塩からなる群より選ばれる少なくとも1種を含む外用組成物。【選択図】なし
