The glargine insulin injection pen is for single use, this device is also called pre-filled injection device, the glargine insulin injection pen contains 3mL:300IU refill, the refill is sealed in the pre-filled injection device, the glargine insulin injection pen is a clear liquid, there is no need to re-mix it before using the medication. Empty injection pens cannot be reused and must be discarded as required. To prevent the possibility of disease transmission, each injection pen can only be used by one patient. A new needle needs to be fitted and safety tested before each injection, and only needles suitable for this pre-filled injection device should be used. When the pre-filled injection device is broken, or it is not possible to determine if it is working properly, it should not be used again. Glargine insulin injection pens need to be stored in the refrigerator under refrigeration. Glargine insulin injection pens that are in use should be kept at room temperature, which can guarantee quality for four weeks. You need to carry the glargine insulin injection pen with you when you travel by air, and it cannot be checked in with your luggage.