Xolair

Black Box Warning

Generic: omalizumab

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Information reviewed July 24, 2026

Rank #77 in US TV Ads
Class: Anti-IgE Monoclonal Antibody

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What is it for?

An injection for allergic asthma, chronic hives, and reducing allergic reactions to accidental food exposure.

Primary Condition

Allergic asthma, chronic hives, food allergy

How it works

Binds IgE antibodies to stop the allergic cascade that triggers asthma and hives.

Common Side Effects

This is not a complete list of side effects. Always consult with a doctor.

  • Anaphylaxis (severe allergic reaction)
  • Injection site reactions
  • Joint pain
  • Headache
  • Dizziness

Xolair FAQs

What is Xolair used for?

Xolair (omalizumab) is a prescription medication used to treat Allergic asthma, chronic hives, food allergy. An injection for allergic asthma, chronic hives, and reducing allergic reactions to accidental food exposure.

How does Xolair work?

Binds IgE antibodies to stop the allergic cascade that triggers asthma and hives.

What are the common side effects of Xolair?

Commonly reported side effects of Xolair include Anaphylaxis (severe allergic reaction), Injection site reactions, Joint pain, Headache, and Dizziness. This is not a complete list — tell your doctor or pharmacist about any side effects you experience.

Does Xolair have any serious warnings?

Yes. Xolair carries an FDA Boxed Warning — the agency's most serious safety warning. Read the full prescribing information and talk to your doctor about the risks before starting or changing treatment.

What is the generic name for Xolair?

The active ingredient in Xolair is omalizumab, which belongs to a class of medicines known as Anti-IgE Monoclonal Antibody.

Who makes Xolair?

Xolair is manufactured by Genentech/Novartis. It was first approved in 2003.

How can I save money on Xolair?

You may be able to lower the cost of Xolair by using a free pharmacy discount card or by comparing prices across pharmacies before you fill your prescription. Savings vary by pharmacy and location.

Common questions about Xolair

Other Respiratory medications

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Quick Facts

Manufacturer

Genentech/Novartis

Year Approved

2003

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