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Xolair is a monoclonal antibody that binds to immunoglobulin E (IgE), a protein involved in allergic responses. In chronic idiopathic urticaria, excess free IgE triggers mast cells to release histamine, causing hives and itch. By reducing free IgE levels, Xolair lowers mast cell activation and helps control symptoms in patients who have not responded adequately to antihistamines.

For chronic idiopathic urticaria, the standard FDA-approved dose is 300 mg administered by subcutaneous injection every 4 weeks. Unlike dosing for asthma, the urticaria dose is fixed and does not depend on IgE levels or body weight. Your prescribing physician will confirm the appropriate dosing schedule for you.

Many patients notice a reduction in hive frequency and itch within the first 1 to 3 doses (4 to 12 weeks). Some respond more quickly while others may need 4 to 6 months to see the full benefit. Ongoing antihistamine use during this period is often recommended by the treating physician.

Common side effects include injection-site reactions such as bruising, redness, or swelling, as well as headache, joint pain, and upper respiratory tract infections. A rare but serious risk is anaphylaxis, which can occur within 2 hours of injection. Because of this risk, the first several injections are typically administered in a healthcare setting with a 30-minute observation period.

Yes. Many patients continue using antihistamines such as fexofenadine or cetirizine alongside Xolair, especially during the initial weeks of treatment. Your physician will advise whether to maintain, adjust, or eventually taper antihistamine use based on your symptom response.

The appropriate duration of treatment varies by patient. Some people achieve lasting remission after 6 to 12 months and can discontinue Xolair, while others require longer-term therapy to keep symptoms controlled. Your physician will periodically reassess whether continued treatment is warranted.

Doctronic uses an AI-guided evaluation to gather your symptom history, current medications, and any health changes since your last prescription. A licensed physician then reviews all of this information and, when clinically appropriate, issues a refill prescription. You receive a personalized treatment plan without needing an in-office visit.

Yes. Doctronic connects you with fully licensed physicians who conduct a real clinical review of your information before prescribing. All consultations are doctor-reviewed, subject to quality audits, and conducted on a HIPAA-compliant platform to protect your privacy. Refills are only issued when it is medically appropriate to do so.