• Am J Health Syst Pharm · Jun 2016

    Review

    Pharmacologic management of angioedema induced by angiotensin-converting enzyme inhibitors.

    • Michael J Scalese and Travis S Reinaker.
    • Department of Pharmacy Practice, Auburn University Harrison School of Pharmacy, Mobile, AL. mjs0065@auburn.edu.
    • Am J Health Syst Pharm. 2016 Jun 15; 73 (12): 873-9.

    PurposeThe published evidence on pharmacologic approaches to the management of angiotensin-converting enzyme inhibitor (ACEI)-induced angioedema is reviewed.SummaryAngioedema is a serious, potentially life-threatening adverse effect of ACEI use. Although the underlying mechanism is not fully understood, excess bradykinin produced through a complex interplay between the kallikrein-kinin and renin-angiotensin-aldosterone systems is thought to play a major role. The nonallergic nature of the reaction renders traditional therapies (corticosteroids and antihistamines) ineffective because those agents do not modify the proposed pathophysiology. Fresh frozen plasma (FFP) provides kinase II, a protein that breaks down bradykinin. Case reports support FFP as a treatment for ACEI-induced angioedema, but no formal evaluations have been completed to date. Both ecallantide and complement 1 esterase (C1) inhibitor concentrate reduce bradykinin production through upstream inhibition of kallikrein. C1 inhibitor concentrate has been used successfully to manage ACEI-induced angioedema in a few reported cases, but robust supportive studies are lacking. Conversely, ecallantide has been evaluated in multiple randomized trials but has not been shown to offer advantages over traditional therapies. The use of icatibant, a direct antagonist of bradykinin B2 receptors, was reported to be beneficial in several case reports and in a small Phase II study, safely and rapidly reducing symptoms of ACEI-induced angioedema. An ongoing Phase III trial (NCT01919801) will better define the role of icatibant in the management of ACEI-induced angioedema.ConclusionFFP, C1 inhibitor, and icatibant appear to be safe and effective therapeutic options for the management of ACEI-induced angioedema, whereas it appears ecallantide should be avoided.Copyright © 2016 by the American Society of Health-System Pharmacists, Inc. All rights reserved.

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