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MediumPharmacologyAnticoagulation Management, High INRukmlamrcgp aktpaneprescribing safety assessment

A 55-year-old patient stabilized on long-term warfarin for recurrent DVT attends the anticoagulation clinic for routine monitoring. They report no signs of bleeding or recent illness. Today's INR result is 6.8 (target range 2.0-3.0). According to BNF guidance, what is the most appropriate immediate action?

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