: an immunosuppressive drug that is a recombinant monoclonal antibody selectively binding to IgE to reduce allergic reactions and that is administered by subcutaneous injection especially in the treatment of asthma and chronic hives

Note: Omalizumab is marketed under the trademark Xolair.

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“Omalizumab.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/omalizumab. Accessed 13 Mar. 2025.

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