USMLE Step 1 - Question 4

A 45-year-old male with a history of hypertension and hyperlipidemia complains of generalized weakness. His laboratory studies are below.

Serum

Na+  144 mEq/L
K+  5.9 mEq/L
Cl-  101 mEq/L
HCO3-  16 mEq/L
Urea nitrogen  66 mEq/L
Cr  2.8 mEq/L
Uric acid  13.1 mEq/L
Calcium  6.1 mEq/L

Urine dipstick

Specific gravity: 1.030
Blood: positive
Nitrates: negative
Leukocyte esterase: negative
Urine microscopic examination
No WBCs
No RBCs

Which of the following medications is likely the cause of his symptoms?

A. lisinopril

B. verapamil

C. digoxin

D. rosuvastatin

E. hydralazine

PROCEED TO ANSWER