A client in the emergency department is taking rifampin (Rifadin) for tuberculosis. The client reports yellowing of the sclera and skin and bleeding after minor trauma. What laboratory results correlate to this condition? (Select all that apply.)
a. Blood urea nitrogen (BUN): 19 mg/dL
b. International normalized ratio (INR): 6.3
c. Prothrombin time: 35 seconds
d. Serum sodium: 130 mEq/L
e. White blood cell (WBC) count: 72,000/mm3
ANS: B, C
Rifampin can cause liver damage, evidenced by the client's high INR and prothrombin time. The BUN and WBC count are normal. The sodium level is low, but that is not related to this client's problem.
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