The Food and Drug Administration (FDA) announced that it has requested Genentech, Inc. add a boxed warning to the product label for omalizumab, marketed as Xolair.
The boxed warning emphasizes that Xolair, used to treat patients with asthma related to allergies, may cause anaphylaxis. Anaphylaxis may include trouble breathing, chest tightness, dizziness, fainting, itching and hives, and swelling of the mouth and throat. In addition, FDA has asked Genentech to revise the Xolair label and provide a Medication Guide for patients to strengthen the existing warning for anaphylaxis.
Xolair was approved in 2003 to treat adults and adolescents (12 years of age and above) with moderate to severe persistent asthma who have tested positive for a perennial aeroallergen (pollen, grass or dust) and whose symptoms are inadequately controlled with inhaled steroids. In clinical trials, Xolair decreased the rate of asthma exacerbations, which were defined as a worsening of asthma that required treatment with systemic corticosteroids or a doubling of baseline inhaled corticosteroid dose.