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Metformin contrast procedure — GPhC CRA MCQ

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ModerateRenal and Hepatic ImpairmentMetformin contrast procedureGPhC CRA

A patient taking metformin for type 2 diabetes is due to have iodinated contrast for CT angiography. His eGFR is 32 mL/min/1.73 m2. He asks whether any diabetes medicine changes are needed. What would you advise the patient?

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

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Correct answer: C — Follow the imaging unit’s metformin-withholding plan

Metformin may need temporary withholding around iodinated contrast in patients with reduced renal function or acute kidney injury risk. The decision depends on renal function, contrast route and local protocol. The patient should follow prescriber or imaging-unit advice and know when renal function will be rechecked.

Reference: https://www.pharmacyregulation.org/students-and-trainees/pharmacist-education-and-training/registration-assessment