| abstract |
[Problem] To provide a method for easily and stably storing P1, P4-bis(5'-uridyl)tetraphosphate crystals for a long period of time. [Solution] A method for storing P1, P4-bis(5'-uridyl)tetraphosphate crystals or a pharmaceutically acceptable salt thereof in a package, which is characterized by storing under one condition selected from among the storage conditions (1)-(3) described below. (1) The storage temperature is 0øC or higher but lower than 25øC. (2) The storage temperature is 25øC or higher but lower than 40øC, and the crystal pH is 4.5-8.0. (3) The storage temperature is 40øC or higher but lower than 60øC, and the crystal pH is 5.0-6.4. |