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Amiodarone warfarin — GPhC CRA MCQ

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HardDrug InteractionsAmiodarone warfarinGPhC CRA

A patient stable on warfarin is newly prescribed amiodarone and the anticoagulation clinic is unaware. What is the most important interaction to flag?

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Correct answer: AAmiodarone can increase warfarin effect and INR

Amiodarone can potentiate warfarin and the interaction may develop over time. In this scenario, the pharmacist should prioritise safe supply, appropriate counselling and timely referral or clarification where needed. This is the single best answer because the other options would either delay assessment, ignore a clinically significant risk, or create an unsafe legal or professional outcome.

Reference: BNF