I have been a diabetic for 55 years, and was never concerned about using insulin for just 28 days. I use it longer, and check the bottle to make sure it is OK. Does anyone else do this? Also, found out that Lantus losses about 1% potency each month. If you can't keep it in the refrigerator for over a month…how come the 2010 experation date? I think this is all just to sell more insulin!
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