Zolpidem tartrate salt content in the solutions

Disclosed is a liquid preparation for internal use containing a stable zolpidem tartrate salt and a pH regulator that does not cause precipitation even when stored for a long time. A liquid preparation for internal use comprising zolpidem tartrate and a pH adjusting agent, wherein the pH of the liquid preparation is 2.0 to 7.0. In a further aspect, the above internal liquid preparation further comprising a sweetening agent. The liquid preparation for internal use does not cause precipitation even when stored for a long period of time, has a feature that it is stable and masks unpleasant tastes such as bitterness peculiar to zolpidem tartrate, and is easy to take. [Selection figure] None