PROBLEM TO BE SOLVED: To provide a liquid medicine containing sumatriptan succinate for internal use, capable of being immediately taken when the headache of migraine is developed, and having excellent long-term preservation stability, and improved intake easiness brought by the masking of bitterness.SOLUTION: The liquid medicine for the internal use contains the sumatriptan succinate, a pharmacologically acceptable organic acid, preferably a 4C-6C di- or tri-carboxylic acid which may be substituted with hydroxy, or ascorbic acid, and water. Preferably, the liquid medicine contains an alkali metal salt of the organic acid and a sweetener besides them.COPYRIGHT: (C)2012,JPO&INPIT【課題】片頭痛の頭痛発現時に即服用可能なスマトリプタンコハク酸塩含有内用液剤であって、長期保存安定性に優れ、かつ、苦味がマスキングされて服用性が改善されたスマトリプタンコハク酸塩含有内用液剤の提供。【解決手段】スマトリプタンコハク酸塩、薬理学上許容しうる有機酸、好ましくはヒドロキシ置換を有してもよい炭素数4~6のジ又はトリカルボン酸又はアスコルビン酸、及び水を含有し、好ましくは、さらに該有機酸のアルカリ金属塩、甘味剤を含有することを特徴とする内用液剤。【選択図】なし
