Xolair (Omalizumab)

What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.

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Prescription Required

  • Product Details


    Xolair is an injectable medication used to treat the following conditions:

    • Persistent asthma
    • Chronic rhinosinusitis with nasal polyps
    • Hives that are spontaneous and recurring

    Fact Table




    EU EMA, US DailyMed



    Legal status


    Chemical Name


    Elimination half-life

    26 days

    Dosage (Strength)



    Consult with Doctor



    Protein binding


    PubChem CID






    ATC code






    Routes of administration



    Xolair should be administered as directed by your doctor. Talk to your doctor about any questions or concerns you may have.

    Your doctor will tell you how much and how often you should receive Xolair injections, depending on the condition being treated.


    Omalizumab is the active ingredient contained in Xolair injection.


    Xolair should not be administered to patients who are allergic to any of its ingredients.


    Xolair contains an FDA Boxed Warning regarding the occurrence of anaphylaxis, a serious reaction that can cause tightening of the airway muscles, low blood pressure, fainting, hives, and/or swelling of the tongue or throat. Xolair treatment should be started in a healthcare setting where patients can be observed after its administration and anaphylaxis can be managed if it occurs. Patients should immediately seek emergency care if they develop symptoms of a serious reaction.

    • Before you start treatment with Xolair, tell your doctor about:
      • All the medications you take
      • Your allergies
      • Your health conditions and past medical history
      • Your pregnancy or breastfeeding status
    • Malignancies have been reported in patients treated with Xolair.
    • Xolair should not be used to treat an asthma attack or sudden breathing problems.
    • Corticosteroids should not be abruptly stopped upon starting treatment with Xolair; they should be gradually decreased.
    • Xolair can cause eosinophilic conditions. Patients should seek care if they experience a rash, pulmonary problems, heart problems, and/or nerve problems like nerve pain.
    • Xolair should be stopped if patients experience a fever, joint pain, and rash.

    Side Effects

    Xolair–like any medication–can cause side effects. The most common include–but are not limited to–joint pain, general pain, leg pain, fatigue, dizziness, fracture, arm pain, fever, skin problems, earache, headache, stomach pain, nose bleed, injection site reaction, nausea, common cold, sinus inflammation, upper respiratory tract infection, and cough. Contact your doctor right away if you develop bothersome or persistent side effects.

    Looking for a competitive Xolair cost? Learn more about Xolair injections and discover where you can buy Xolair at Canada Pharmacy.


    1. Xolair. South San Francisco, CA: Genentech, Inc.; 2023.

    IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.

    Product Code : 12264

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