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High-strength insulin prescription — GPhC CRA MCQ

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ModerateDispensing and SupplyHigh-strength insulin prescriptionGPhC CRA

A prescription for insulin degludec 200 units/mL states 'inject 20 units daily'. The patient previously used a 100 units/mL insulin pen. What is the legal classification/requirement?

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

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Correct answer: ACounsel carefully that the pen delivers units as dialled and ensure the formulation change is intentional

High-strength insulin products require careful counselling to avoid dose-conversion errors. Pens are designed to deliver the number of units dialled, so patients should not halve the unit dose unless prescribed. Transferring insulin from pens to syringes is unsafe. A formulation change should be verified and clearly explained.

Reference: BNF; GPhC Standards