Journal
JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY
Volume 128, Issue 3, Pages 567-U195Publisher
MOSBY-ELSEVIER
DOI: 10.1016/j.jaci.2011.06.010
Keywords
Chronic idiopathic urticaria; chronic spontaneous urticaria; H-1-antihistamine; hive; itch; omalizumab; urticaria activity score; dose ranging
Categories
Funding
- Genentech, Inc (South San Francisco, Calif)
- Novartis Pharmaceuticals Corporation (East Hanover, NJ)
- Genentech/Novartis
- Novartis
- GlaxoSmithKline
- TKL Perrigo
- Amgen
- AstraZeneca
- Schering-Plough
- Genentech
- Boehringer Ingelheim
- Merck
- Medpoint
- Sunovion
- KarmelSonix
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Background: Proof-of-concept studies with omalizumab in patients with chronic idiopathic urticaria (CIU) have shown significant decreases in mean urticaria activity scores (UASs). Objective: We sought to evaluate the efficacy and safety of omalizumab in patients with CIU who remain symptomatic despite concomitant H-1-antihistamine therapy. Methods: This phase II, prospective, double-blind, placebo-controlled, dose-ranging study investigated omalizumab in patients aged 12 to 75 years in the United States and 18 to 75 years in Germany with a UAS over 7 days (UAS7) of 12 or greater despite antihistamine therapy. Patients were randomized 1:1:1:1 to receive a single subcutaneous dose of 75, 300, or 600 mg of omalizumab or placebo added to a stable dose of H-1-antihistamine. The primary efficacy outcome was change from baseline to week 4 in UAS7. Patients were followed for an additional 12 weeks to monitor safety. Results: Ninety patients from the United States or Germany were enrolled. Both the 300-mg omalizumab group (-19.9 vs -6.9, P < .001) and the 600-mg omalizumab group (-14.6 vs -6.9, P = .047) showed greater improvement versus the placebo group in UAS7. No meaningful difference was observed for the 75-mg omalizumab group. Similar results were seen for key secondary end points of weekly hive and itch scores. Onset of effect occurred after 1 to 2 weeks. Omalizumab was well tolerated, and the incidence of adverse events was similar across treatment groups. Conclusion: This study demonstrated that a fixed dose of 300 or 600 mg of omalizumab provides rapid and effective treatment of CIU in patients who are symptomatic despite treatment with H-1-antihistamines. (J Allergy Clin Immunol 2011;128:567-73.)
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