Which Laboratory Blood Test Result for a Patient Taking Clarithromycin

question 6

Multiple Choice

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

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