A 69-year-old man has a 2-day history of abdominal pain and urinary incontinence. His medications are diphenhydramine, metoprolol, and simvastatin. Serum creatinine is 1.6 mg/dL. Which of the following is most likely to be seen in this patient?
15 BUN/Cr; 0.5% FENa; 350 mOsm urine osmolality
17 BUN/Cr; 1.9% FENa; 350 mOsm
19 BUN/Cr; 2.1% FENa; 550 mOsm
21 BUN/Cr; 0.7% FENa; 350 mOsm
25 BUN/Cr; 2.1% FENa; 550 mOsm
28 BUN/Cr; 3.0% FENa; 550 mOsm
