1. Intravenous Cetirizine Versus Intravenous Diphenhydramine for the Treatment of Acute Urticaria: A Phase III Randomized Controlled Noninferiority Trial
- Author
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Michael S. Blaiss, Ian G. Stiell, Howard A. Klausner, A Kessler, Joseph J. Moellman, Jeffrey M. Caterino, Jie Du, Selim Suner, Joseph P. Herres, Benjamin S. Abella, and William E. Berger
- Subjects
Adult ,Male ,Canada ,Adolescent ,Urticaria ,medicine.drug_class ,medicine.medical_treatment ,Sedation ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,Double-Blind Method ,Randomized controlled trial ,law ,medicine ,Clinical endpoint ,Anticholinergic ,Humans ,030212 general & internal medicine ,Adverse effect ,Aged ,Aged, 80 and over ,business.industry ,Diphenhydramine ,030208 emergency & critical care medicine ,Middle Aged ,Cetirizine ,United States ,Treatment Outcome ,Anesthesia ,Emergency Medicine ,Administration, Intravenous ,Female ,Antihistamine ,medicine.symptom ,business ,medicine.drug - Abstract
Study objective Acute urticaria is a frequent presentation in emergency departments (EDs), urgent care centers, and other clinical arenas. Treatment options are limited if diphenhydramine is the only intravenous antihistamine offered because of its short duration of action and well-known adverse effects. We evaluate cetirizine injection, the first second-generation injectable antihistamine, for acute urticaria in this multicenter, randomized, noninferiority, phase 3 clinical trial. Methods Adult patients presenting to EDs and urgent care centers with acute urticaria requiring an intravenous antihistamine were randomized to either intravenous cetirizine 10 mg or intravenous diphenhydramine 50 mg. The primary endpoint was the 2-hour pruritus score change from baseline, with time spent in treatment center and rate of return to treatment centers as key secondary endpoints. Frequency of sedation and anticholinergic adverse effects were also recorded. Results Among 262 enrolled patients, the 2-hour pruritus score change from baseline for intravenous cetirizine was statistically noninferior to that for intravenous diphenhydramine (–1.6 versus –1.5; 95% confidence interval –0.1 to 0.3), and in favor of cetirizine. Treatment differences also favored cetirizine for mean time spent in treatment center (1.7 versus 2.1 hours; P=.005), return to treatment center (5.5% versus 14.1%; P=.02), lower change from baseline sedation score at 2 hours (0.1 versus 0.5; P=.03), and adverse event rate (3.9% versus 13.3%). Conclusion Intravenous cetirizine is an effective alternative to intravenous diphenhydramine for treating acute urticaria, with benefits of less sedation, fewer adverse events, shorter time spent in treatment center, and lower rates of revisit to treatment center.
- Published
- 2020
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