Intestinal angioedema is a rare side effect of angiotensin-converting enzyme inhibitors. We present a 41-year-old woman with sporadic right lower quadrant abdominal pain and diarrhea with multiple computed tomography scans demonstrating enteritis. Suspicion turned to angiotensin-converting enzyme inhibitor use as the cause for the patient's illness after an extensive negative evaluation including labs, stool studies, endoscopies, and capsule endoscopy. Weeks after stopping the medication, the patient's symptoms improved and repeat computed tomography showed a resolution of the previously seen findings of enteritis. This case illustrates the importance of a good medication review to make appropriate clinical decisions and diagnoses.
Keywords: Adverse drug effects; Angiotensin-converting enzyme inhibitor; Enteritis; Intestinal angioedema.