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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.
A bottle is supposed to be fresh for 28 days after you take it out of the fridge and start using it. As long as it wasn't in direct sunlight you should be okay. Cold insulin kind of hurts when you inject it-I never store mine in the fridge except the bottles I haven't opened yet.