From Kentucky, USA:
How long can you use a bottle of insulin, if it is kept refrigerated? It is suggested that you discard bottles of insulin that is not refrigerated after a month's use. Is that true for insulin that is kept in the refrigerator also?
Unopened, and kept in the fridge, insulin is good until the expiration date. Make sure it doesn't freeze. Once open, insulin is probably okay if it is used until it is gone. If you take it in and out of the refrigerator, I would open a new one in 1-2 months or at any time you have any unexplained problems with your blood glucose readings. Depending on your dose, a teen and adult would usually use up the bottle by then anyway. Make sure you mix the cloudy insulin well, so that the concentration at the bottom is the same as when you open the bottle!
Original posting 7 Aug 1998
Posted to Insulin
Last Updated: Tuesday April 06, 2010 15:08:58
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