A 42-year-old patient develops an abrupt and short-lived swelling of her tongue, mouth, and mucous membranes. There are no other parts of the body affected. The swelling is most pronounced around the eyes and lips. The internal lining of the upper respiratory tract is involved and the patient is immediately intubated. You suspect a diagnosis of angioedema. Which of the following medications the most likely cause of this reaction? 

A. Lisinopril

B. Vancomycin

C. Ampicillin

D. Trimethoprim-sulfamethoxazole

E. Doxycycline

To find out the correct answer and read the explanation, click here. 

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