AhaBulbStuff Everyone Should Know
AhaBulb: Stuff Everyone Should Know · ahabulb.com/diab-insulin-frozen

Your insulin accidentally froze. What does the FDA say?

Don't use insulin that has been frozen.

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  1. Don't use it ✔
  2. Thaw it and use it
  3. Use it, but only at night

Why: Extreme cold and heat make insulin less effective. FDA says not to use insulin that has been frozen, and to keep it from freezing when packing it with ice.

Huh, didn't know that: The longer insulin is exposed to extreme heat or cold, the less effective it becomes.

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What kind of water can't freeze? Hot water.
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References

Answer: Don't use it. Extreme cold and heat make insulin less effective. FDA says not to use insulin that has been frozen, and to keep it from freezing when packing it with ice.

  1. FDA, Information Regarding Insulin Storage www.fda.gov/drugs/emergency-preparedness-drugs/information-regarding-insulin-storage-and-switching-between-products-emergency
    Do not use insulin that has been frozen.
    Checked 2026-10-09.

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