| 摘要 |
Provided is a pre-filled syringe having an intermediate gasket that is substantially formed of one member, excellent in slidability/fluid-tightness, has low water-absorptivity, and is less influential on a pH of a liquid drug. A liquid drug is enclosed in the second chamber located on the base end side with respect to the intermediate gasket while a powdered drug is enclosed in the first chamber located on the front end side with respect to the intermediate gasket. The intermediate gasket has at least two layers including a front end layer corresponding to a wall of the first chamber and a base end layer corresponding to a wall of the second chamber, and also has a low water-absorptive layer in the layer on the base end side with respect to the front end layer. The base end layer is formed of a material having low water-absorptivity and not lowering a pH of the liquid drug. |
