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Insulin storage — GPhC CRA MCQ

Instant feedback + full explanation. One question, done properly.

ModerateEndocrine TherapeuticsInsulin storageGPhC CRA

A man with type 1 diabetes collects insulin aspart pens and says he left a new box in his car overnight during freezing weather. The cartridges look clear and he needs insulin for today. What is the most appropriate action?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: A — Do not use the frozen insulin; arrange an urgent replacement supply

Insulin exposed to freezing temperatures may lose potency and should not be used even if it later appears normal. The patient requires urgent access to replacement insulin because treatment interruption in type 1 diabetes is dangerous. Visual inspection cannot confirm potency after freezing. Heat exposure would further damage insulin.

Reference: BNF; insulin SmPC