What is Xolair?
Xolair® (generic name: omalizumab) is an injectable medicine that works as an anti-IgE antibody. It helps reduce allergic reactions by blocking free IgE, which lowers immune system overreactions. This results in less inflammation in the airways, skin, and nasal passages
Approved Uses of Xolair
Xolair has been approved for several conditions:
- Allergic Asthma (moderate to severe persistent)
- For adults and children 6 years and older.
- Suitable for patients with confirmed allergy test results (skin test or lab test).
- Used when symptoms cannot be controlled with inhaled corticosteroids alone.
- Not for sudden asthma attacks or life-threatening asthma emergencies.
- IgE-Mediated Food Allergy
- For adults and children 1 year and older.
- Helps reduce the risk and severity of type 1 allergic reactions, including anaphylaxis, if exposed to allergens by accident.
- Must be used together with strict food avoidance.
- Not for emergency treatment of allergic reactions.
- Chronic Rhinosinusitis with Nasal Polyps (CRSwNP)
- For adults 18 years and older.
- Used as an add-on treatment when nasal steroid sprays are not enough.
- Chronic Spontaneous Urticaria (CSU – chronic hives)
- For adults and adolescents 12 years and older.
- Suitable for patients who still have symptoms even after taking antihistamines.
- Not for other types of hives or general allergies.
Who May Benefit from Xolair?
- Asthma patients with confirmed allergies who still have symptoms despite standard treatments.
- Patients with chronic hives that do not improve with antihistamines.
- Adults with nasal polyps causing congestion and loss of smell, not relieved by nasal sprays.
- Patients with multiple or severe food allergies who need extra protection against accidental exposure (but still must carry epinephrine auto-injectors).
How is Xolair Given?
- Xolair is given as a subcutaneous (under the skin) injection.
- Available as prefilled syringes or auto-injectors.
- Usually injected in a hospital/clinic, but in some cases, patients may be trained to inject at home.
Dosing depends on:
- Patient’s actual body weight.
- Pre-treatment IgE blood levels (for asthma, food allergy, CRSwNP; not required for CSU).
Important notes:
- IgE levels rise naturally during treatment, so dosing is never adjusted based on IgE during therapy.
- If treatment is stopped for over a year, IgE may be tested again before restarting.
- Typical treatment plan:
- Injections every 2 or 4 weeks.
- Doctors usually review progress after 3–6 months.
- For CSU, common doses are 150 mg or 300 mg every 4 weeks.
- If symptoms improve, dose tapering may be considered after 6–12 months.
Safety Warnings
- Not an emergency medication. Xolair cannot replace inhalers for sudden asthma attacks or epinephrine for anaphylaxis.
- Serious allergic reactions (including anaphylaxis) can occur during or after injection. Patients should be observed after injections and instructed to seek immediate medical care if symptoms such as hives, swelling, chest tightness, wheezing, dizziness, or fainting occur.
Possible Side Effects
Common side effects:
- Headache
- Fatigue
- Joint pain
- Nausea
- Injection site reactions (redness, swelling, pain)
- Mild cough or sore throat
Less common but serious:
- Severe allergic reaction (anaphylaxis)
- High eosinophils or rare blood vessel inflammation (Churg-Strauss-like syndrome)
Patients must go to the hospital immediately if they experience severe allergic symptoms.
Before Starting Xolair
- Confirm that your condition matches the approved indications.
- Get IgE testing and body weight measured (except for CSU).
- Review your medical history, especially if you had severe drug or vaccine reactions.
- Discuss treatment goals: Xolair is usually an add-on therapy, not a replacement for other standard medicines.
Frequently Asked Questions (FAQ)
Q: Can Xolair be used to treat emergency allergic reactions?
A: No. Xolair reduces long-term allergic activity but is not a rescue medication. For sudden severe reactions, epinephrine and hospital care are required.
Q: How often will I need injections?
A: Usually every 2–4 weeks. The total duration depends on your response and your doctor’s plan.
Q: Is Xolair safe for children?
A: Yes, in certain conditions:
- Asthma: 6 years and older
- Food allergy: 1 year and older
- CSU (hives): 12 years and older
- CRSwNP: adults only (18+ years)
Q: Do I need blood tests while on treatment?
A: IgE testing is done only before starting therapy (not during). Routine monitoring focuses on safety and response.
Q: Can I inject Xolair at home?
A: Some patients may be allowed after proper training and risk assessment, but medical supervision is still strongly recommended.
Q: Is Xolair expensive?
A: Yes. It is a biologic drug, and cost depends on the dose, frequency, and your insurance or healthcare system. Prices vary by country and hospital.
