Warfarin and cranberry products — GPhC CRA MCQ

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HardDrug InteractionsWarfarin and cranberry productsGPhC CRA

A patient taking warfarin with stable INR asks about starting concentrated cranberry capsules daily. What is the most important interaction to flag?

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Correct answer: E — Possible increased anticoagulant effect and bleeding risk

Cranberry products may increase anticoagulant effect in some patients taking warfarin. This makes possible increased anticoagulant effect and bleeding risk the single best answer in this scenario. The other options would either miss the key safety issue, delay appropriate review, or fail to meet the relevant clinical or professional requirement.

Reference: BNF interactions