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A: If your room temperature goes above about 80 degrees Fahrenheit, you would be safer to keep your insulin in the refrigerator. Q: I use an insulin pen. I have heard I should keep my pen at room temperature for only two weeks. But insulin in vials can be kept at room temperature up to 28 days.
The three drug manufacturers of insulin in the United States say UNOPENED insulin is best stored inside the fridge [2Â° to 8Â°Celcius (36Â° to 46Â°Fahrenheit)]. UNOPENED insulin stored in the refrigerator is good until the expiration date printed on the insulin box. The expiration date will usually be 1 year from the date of purchase but you have to check the box to find out. Once open there are different storage needs for insulin.