C1 esterase inhibitor for angiotensin-converting enzyme inhibitor-induced angioedema at a community teaching health system: A brief retrospective propensity-matched cohort study.

Introduction: Angiotensin-converting enzyme inhibitor (ACEi)-induced angioedema is a serious emergency that can cause life-threatening symptoms and death if not treated promptly. Potential treatment options for ACEi-induced angioedema include medications with limited evidence for use in this patient population. The purpose of this study was to evaluate the use, clinical efficacy, and angioedema-related medication costs of C1 esterase inhibitor (C1EI) for ACEi-induced angioedema.