USMLE Step 1 - Question 6

A 52 year old male with a history of hypertension, dyslipidemia, and congestive heart failure presents to the emergency department with acute onset swelling of the lips, eyes, and tongue causing airway obstruction and respiratory distress. He also has an urticarial rash. Which of the following medications is the likely culprit of his current symptoms?

A. pindolol

B. clonidine

C. felodipine

D. captopril

E. methyldopa