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Warfarin diet counselling — GPhC CRA MCQ

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ModeratePatient Counselling and Pharmaceutical CareWarfarin diet counsellingGPhC CRA

A 63-year-old man collecting warfarin says his diet has changed after starting a weight-loss plan with large daily portions of kale and spinach. His INR has fallen from 2.6 to 1.8. He has no missed doses. What would you advise the patient?

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

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Correct answer: D — Keep vitamin K intake consistent and contact the anticoagulation clinic

Warfarin effect is influenced by changes in vitamin K intake, so consistency is more important than complete avoidance. A subtherapeutic INR should be managed through the anticoagulation service rather than patient-led dose changes. The pharmacist should reinforce bleeding and thrombosis safety-netting.

Reference: BNF; NICE CKS