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What is Xolair?

Xolair (omalizumab) is an IgE blocker prescribed to treat allergy-induced asthma. IgE, short for immunoglobulin E, is a substance produced by your body in reaction to allergens in your environment. If you have allergy-induced asthma, your body creates too much IgE setting off a chain reaction leading to asthma attacks. Xolair treats asthma by blocking the production of IgE. Doctors usually resort to Xolair when other treatment options have failed to fully control asthma. It is part of a class of medications called monoclonal antibodies. It is administered by injection under the skin once every two to four weeks.

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