PROBLEM TO BE SOLVED: To provide a stable liquid drug for internal use free from precipitation trouble even by storing for a long time and containing zolpidem tartrate and a pH regulator.SOLUTION: There are provided the liquid agent for internal use containing zolpidem tartrate and the pH regulator and having pH of 2.0-7.0, and the above liquid agent further containing a sweetener. The liquid agent for internal use has characteristic features comprising absence of precipitation trouble even by storing for a long time, high stability, and masked disagreeable taste such as characteristic bitter taste of zolpidem tartrate to allow easy taking of the drug.COPYRIGHT: (C)2011,JPO&INPIT【課題】長時間保存しても析出が生じない安定なゾルピデム酒石酸塩およびpH調節剤を含有する内用液剤を提供する。【解決手段】ゾルピデム酒石酸塩およびpH調節剤を含む内用液剤であって、該液剤のpHが2.0~7.0である液剤。さらなる態様において、甘味剤をさらに含む上記内用液剤。当該内用液剤は、長期間保存した場合にも析出が生じず、安定で、かつゾルピデム酒石酸塩特有の苦味等の不快な味がマスキングされており、服用しやすいといった特徴を有する。【選択図】なし
