Which laboratory blood test result for a patient taking clarithromycin (Biaxin) and warfarin (Coumadin) should you report immediately to the prescriber?

a. Potassium 3.6 mEq/L
b. Sodium 134 mEq/L
c. Blood urea nitrogen (BUN) 21 mg/dL
d. International normalized ratio (INR) 4.6


ANS: D

Nursing

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