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From Newaygo, Michigan, USA:

What happens when insulin is "old?" Does it become poisonous or just lose its effectiveness? How long after the date on the bottle does this happen? How can a person tell?


Provided it's not frozen or cooked, then insulin lasts much longer than the shelf-life that manufacturers quote. However, it does gradually lose its potency which would be manifest by poorer control.


[Editor's comment: For more information, you may want to read How Long Should Insulin Be Used Once a Vial Is Started?". BH]

Original posting 9 Jan 2005
Posted to Insulin


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Last Updated: Tuesday April 06, 2010 15:10:00
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