Angioedema responding to antiprotease treatment but without abnormalities of the complement system

Abstract
Four patients suffered from chronic or recurrent angioedema, of sudden onset in adult life, associated with visceral pain and impossible to control by dietary means. In spite of normal complement [C] function they responded very well to tranexamic acid therapy. Antiprotease drugs need not be restricted to cases of ClsINH [activated C1 inhibitor].