My Allergist/Immunologist and my Pulmonologist have both suggested that I look into starting Xolair. I am a 21 year old university student with moderate to sever "Brittle" asthma and moderate Mast Cell Activation Disorder. Studies have shown that Xolair can work for both illnesses though insurance will only cover it for asthma. Has anyone else with these two conditions taken Xolair? Has Xolair helped many of you (even those with just asthma)? Thank you!