A patient who has been prescribed primidone (Mysoline) also takes warfarin (Coumadin). Which laboratory blood test results indicate a possible drug interaction?

a. Hematocrit 32%
b. Hemoglobin 11.2 g/dL
c. Blood urea nitrogen (BUN) 21 mg/dL
d. International normalized ratio (INR) 0.5


ANS: D

Nursing

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