RT Journal Article SR Electronic T1 Angioedema: Frightening and frustrating JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 203 OP 205 VO 66 IS 4 A2 William S. Wilke A1 William O. Wagner YR 1999 UL http://www.ccjm.org/content/66/4/203.abstract AB Angioedema can have a variety of causes, including drug reactions, food allergies, and C1 esterase inhibitor deficiency, but many cases are idiopathic. Swelling usually subsides in days if the offending agent can be removed. The throat is often involved, but few patients actually require intubation.