What are the outcomes of omalizumab therapy in the treatment of asthma?

Updated: Nov 20, 2020
  • Author: Michael J Morris, MD, FACP, FCCP; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Therapy has been shown to decrease free IgE antibody levels by 99% and cell receptor sites for IgE antibody by 97%. This decrease, in turn, is associated with reduced histamine production (90%), early-phase bronchospasm (40%), and late-phase bronchospasm (70%), as well as a decrease in the number, migration, and activity of eosinophils. Levels drop quickly and remain low for at least a month. This therapy is also effective for allergic rhinitis.

Multiple phase 3 trials show that compared to placebo injections, treatment is associated with larger median inhaled steroid dose reduction (83% vs 50%), higher percentage of discontinuation of inhaled steroids (42% vs 19%), and fewer asthma exacerbations (approximately 15% vs 30%). Quality of life and use of rescue inhaler and the emergency department may also be improved. Omalizumab has been shown to reduce the number of asthma exacerbations.

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