Xolair (omalizumab) is an FDA-approved injectable medication that reduces allergic sensitivity in people with severe food allergies. It does not cure food allergies, but it can lower the risk of serious reactions during accidental exposures. An allergist can help determine if it is right for you.
Living with a severe food allergy is stressful. Every meal, every outing, every social event carries a level of risk that most people never have to think about. If you or your child has been managing a serious food allergy, you may have already heard about Xolair — and you may have questions.
This Brooklyn specialist’s FAQ for food allergy treatment is here to help. Below, you will find clear, straightforward answers about Xolair for severe food allergy, what it does, who it is for, and how to find qualified care close to home.
What Is Xolair and How Does It Work for Severe Food Allergy?
Xolair is the brand name for omalizumab, a biologic medication that targets immunoglobulin E, the antibody your immune system produces in response to allergens. When IgE levels are high, even a tiny amount of a trigger food can cause a serious reaction.
By binding to IgE in your bloodstream, Xolair reduces the amount available to trigger an allergic response. This does not eliminate the allergy. It raises the threshold, meaning accidental exposure is less likely to escalate into a life-threatening reaction.
In February 2024, the U.S. Food and Drug Administration approved Xolair specifically to reduce allergic reactions to one or more foods in adults and children aged one year and older with IgE-mediated food allergies. This was a significant milestone for families who had limited options beyond strict avoidance.
Who Is a Good Candidate for Xolair Treatment?
Not everyone with a food allergy is a candidate for Xolair. Your allergist will evaluate whether it is appropriate for you based on several factors.
Xolair is most commonly considered for patients who:
- Have a confirmed IgE-mediated food allergy to one or more foods
- Are at high risk for accidental exposure despite careful avoidance
- Have had severe or anaphylactic reactions in the past
- Are children or adults for whom strict avoidance is particularly difficult
Your allergist will review your allergy testing results, medical history, and current medications before recommending Xolair. It is not a first-line treatment for mild food allergies.
What Should You Expect During Xolair Treatment?
Xolair is given as a subcutaneous injection, typically every two to four weeks depending on your body weight and IgE levels. Most patients receive injections at an immunology clinic in Brooklyn or a similar outpatient setting, where staff can monitor you for any reaction following the dose.
The first few months are an adjustment period. You may not notice a dramatic difference immediately. Clinical studies leading to FDA approval showed that meaningful reduction in allergic sensitivity developed over time, generally within 16 to 20 weeks of consistent treatment.
Xolair does not replace your epinephrine auto-injector. You should continue carrying it at all times, even during treatment.
How Does an Allergist in Brooklyn Evaluate and Prescribe Xolair?
At an immunology clinic in Brooklyn, the evaluation process usually begins with a comprehensive allergy assessment. This includes a detailed history of your reactions, skin prick testing, and specific IgE blood tests to identify your triggers and confirm the IgE-mediated nature of your allergy.
From there, your allergist will calculate the appropriate Xolair dose based on your total IgE level and body weight. Follow-up appointments are scheduled regularly to monitor your response and adjust the treatment plan if needed.
This is not a treatment you manage alone. Your care team is with you at every step.
What Are the Common Side Effects of Xolair?
Most patients tolerate Xolair well. The most common side effects include injection site reactions such as redness, swelling, or mild discomfort. Some patients experience upper respiratory symptoms or headaches in the first weeks of treatment.
Rarely, Xolair can cause anaphylaxis. This is why injections are administered in a clinical setting where trained staff can respond quickly if needed. Your allergist will advise you to remain at the clinic for observation after each dose.
Taking the Next Step with Your Care Team
Severe food allergies affect the whole family. The fear of accidental exposure, the vigilance required at every meal, the weight of carrying an epinephrine auto-injector every day — these are real burdens, and you deserve thoughtful, expert support.
Our allergists are here to answer your questions, review your history, and help you understand whether Xolair is the right fit for your situation. Reach out to us today by calling +1-347-384-5690 or visit our clinic at 1797 Pitkin Avenue, Brooklyn, NY 11212 to schedule a consultation.
