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From Missouri, USA:

A friend of mine has a granddaughter who was using an insulin pump. She was given some frozen insulin by her pharmacy and since became very ill. Can frozen insulin cause illness and does it cause one's body to reject insulin treatment?


Freezing or overheating insulin are both to be avoided, as they will result in lesser potency of that bottle of insulin, resulting in unexpectedly high blood sugars. However, other than high sugars, frozen insulin wouldn't be expected to cause any other illness, or long-term problems.

By the way, if you think you have a "bad" bottle of insulin, but don't know why, don't throw it away; you can take it back to the pharmacy, explain the problem, and exchange it for a new bottle. (The pharmacist will return it to the manufacturer for analysis of what might have been the problem.)


Original posting 16 Mar 97


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Last Updated: Tuesday April 06, 2010 15:08:54
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