Lab Values to Know for Boards - INR [NP Confidence Corner]

INR is one of the most commonly tested lab values on NP boards, especially when warfarin is involved. In this minisode, I review normal and therapeutic INR ranges, explain what high and low values mean, and walk through the safety-focused thinking behind common exam questions, including when to adjust therapy, when vitamin K is needed, and how diet and medication changes can affect INR levels.

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