Oropharyngeal angioedema associated with the use of angiotensin-converting enzyme inhibitors

Abstract

Angioedema that occurs in the head and neck may be a serious and possibly life-threatening condition. We present two cases of oropharyngeal angioedema associated with the use of angiotensin-converting enzyme inhibitors in patients with no underlying renal failure. Angiotensin-converting enzyme-inhibiting agents are now commonly used to control hypertension. Treatment of acquired angioedema is directed first at protecting the airway by careful observation, intubation, or if necessary, tracheostomy. The causative agent is withdrawn, and the patient is treated with antihistamines and steroids until the acute episode resolves. Although not used in our patients, the treatment of angioedema with subcutaneous epinephrine has been described. As more patients are treated with angiotensin-converting enzyme inhibitors, it becomes essential for the otolaryngologist to become aware of this potentially life-threatening complication.