ACE inhibitor-induced angioedema causing small bowel obstruction.

Mucosal angioedema of the face, lips, tongue, and throat is a well-recognized adverse reaction to angiotensin-converting enzyme (ACE) inhibitors that is experienced by a minority of patients. Rarely, this angioedema can involve the small bowel, and patients commonly present with abdominal pain and small bowel obstruction. Due to the increasing number of patients being treated for hypertension, clinicians should consider the diagnosis of small bowel angioedema secondary to ACE inhibitor use in all patients with this presentation who are using this class of medications.