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Warfarin monitoring — GPhC CRA MCQ

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ModerateCardiovascular TherapeuticsWarfarin monitoringGPhC CRA

A patient newly started on warfarin asks what monitoring is required before their dose can be stabilised. They are taking it for atrial fibrillation. What monitoring is required?

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

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Correct answer: B — Regular INR monitoring with dose adjustment to the agreed target range

Warfarin has a narrow therapeutic index and dosing is guided by INR. The best answer addresses the key safety, legal or pharmaceutical care issue in the vignette. The other options would either delay appropriate care, create a new risk, or fail to resolve the issue. This is consistent with the cited UK reference for safe pharmacy practice.

Reference: BNF; NICE CKS