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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.
This is really a good question. When properly refrigerated (do not freeze) insulin will keep until expiration date on package. If ever frozen, discard the insulin. Insulin expiration dates are usually 1-2 years form date of purchase. I have a bottle that I got in July,09 and it expires 10/2011.