Insulin should not be stored in a freezer. Freezing temperatures can damage the structure and effectiveness of insulin, rendering it potentially unsafe for injection. Insulin is typically recommended to be stored in a refrigerator between 36°F (2°C) and 46°F (8°C) to maintain its stability and potency.
Extreme temperatures, whether too hot or too cold, can compromise the quality of insulin. When insulin is frozen, ice crystals may form, causing denaturation and altering its molecular structure. This can result in reduced potency, making the insulin less effective in regulating blood sugar levels.
If insulin has accidentally been stored in the freezer, it is generally advised not to use it. The freezing may have caused irreversible damage, and the insulin may no longer provide the desired therapeutic effects. It's important to prioritize safety and consult with a healthcare professional or pharmacist for guidance on proper storage and usage of insulin.