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Xolair: 7 things you should know

Medically reviewed by Carmen Pope, BPharm. Last updated on July 4, 2023.

1. How it works

2. Upsides

3. Downsides

If you are between the ages of 18 and 60, take no other medication or have no other medical conditions, side effects you are more likely to experience include:

Note: In general, seniors or children, people with certain medical conditions (such as liver or kidney problems, heart disease, diabetes, seizures) or people who take other medications are more at risk of developing a wider range of side effects. View complete list of side effects

4. Bottom Line

Xolair is an injectable preparation that works by preventing IgE from binding to IgE receptors on mast cells and basophils and may be used to treat allergic asthma, nasal polyps, chronic idiopathic urticaria, and to prevent allergic reactions in people with Ig-E-mediated food allergies. It is administered under the skin once every two to four weeks depending on the condition and is usually well tolerated. Xolair has few interactions.

5. Tips

6. Response and effectiveness

7. Interactions

Medicines that interact with Xolair may either decrease its effect, affect how long it works, increase side effects, or have less of an effect when taken with Xolair. An interaction between two medications does not always mean that you must stop taking one of the medications; however, sometimes it does. Speak to your doctor about how drug interactions should be managed.

There are few reported interactions with Xolair and most interactions are considered mild or not clinically significant. The following medicines or supplements are reported in the product information as interacting with Xolair:

You should refer to the prescribing information for Xolair for a complete list of interactions.


Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use Xolair only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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