Warfarin dose change — GPhC CRA MCQ

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ModerateCardiovascular TherapeuticsWarfarin dose changeGPhC CRA

A patient's warfarin dose is adjusted after a low INR. They ask which test will show whether the new dose is suitable. What monitoring is required?

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Correct answer: A — INR

Warfarin dosing is guided by INR because it reflects anticoagulant effect. In this vignette, "INR" is the safest single best answer. The other options are less appropriate because they miss the key clinical risk, conflict with UK medicines guidance, or delay needed review.

Reference: BNF; NICE CKS