• Jae-Woo Jung, Young Hun Choi, Chang Min Park, Heung Woo Park, Sang-Heon Cho, and Hye-Ryun Kang.
• Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, Korea; Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea.
• Ann. Allergy Asthma Immunol. 2016 Sep 1; 117 (3): 304-309.e1.

BackgroundCorticosteroid prophylaxis has been widely adopted for the prevention of acute allergic-like reactions to iodinated contrast media, but its use is still controversial because there is no strong evidence supporting its efficacy before administration of nonionic low osmolar contrast media (LOCM).ObjectiveTo assess the outcomes of premedication in patients with previous acute allergic-like reactions to LOCM in clinical practice.MethodsA retrospective study was performed on 322 high-risk patients who were reexposed to LOCM after premedication composed of antihistamines and/or systemic corticosteroids because of a previous history of acute allergic-like reactions to LOCM.ResultsAfter premedication, 275 patients (85.4%) did not experience any reaction, but 47 patients (14.6%) still experienced a breakthrough reaction. The premedication rate and amount of corticosteroid administered were significantly higher in the nonrecurrence group than in the recurrence group (P = .04 and P = .04, respectively), and a linear trend was observed in the use of corticosteroid premedication and the efficacy of prevention (P for trend = .02). Multivariate binary logistic regression revealed that corticosteroid premedication was effective in preventing recurrence (odds ratio, 0.284; 95% confidence interval, 0.103-0.784). Nonetheless, despite corticosteroid premedication, 3.4% of high-risk patients still experienced moderate to severe reactions, and 14.3% of patients with a severe index reaction again had a severe reaction.ConclusionPremedication with corticosteroids seems to be helpful in reducing the overall rate of recurrence of acute allergic-like reactions to LOCM in high-risk patients, but patients with severe index reactions are still at risk of developing severe reactions despite corticosteroid premedication.Copyright © 2016 American College of Allergy, Asthma & Immunology. Published by Elsevier Inc. All rights reserved.

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