If insulin is stored for a long time, it needs to be put at 2-8 degrees, and it is usually put in the fresh layer of the refrigerator, which can be put for two years. If it is put for a short time, such as this insulin being used, it needs to be kept at room temperature after opening, and it can be kept at room temperature for one month. Generally from the beginning of insulin press on the needle, if it is in the case of normal use every day, this insulin pen that is being used, is not necessary to put inside the refrigerator, put in a cool and dry place. At home you can usually put it in a drawer, or in a cabinet. Be careful not to put it on the balcony, if there is direct sunlight, the temperature exceeds 30 degrees, or put in a particularly cold place below zero degrees, insulin will lose its biological activity.