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# Xolair (omalizumab): Drug Safety Communication - Slightly Elevated Risk of Cardiovascular and Cerebrovascular Serious Adverse Events
- URL: https://www.foodconsumer.org/xolair_0926140444/
- Published: 2014-09-26T17:43:00.000Z
- Updated: 2026-09-22T18:11:00.000Z
- Description: An FDA safety review found a slightly increased risk of heart and brain blood vessel problems among patients treated with the asthma drug Xolair, and the agency added that information to the label. Cancer rates did not differ, though study limits leave a potential risk unresolved.
- Author: Food Consumer
- Tags: Drug, Health News, #vivvo-import

# Xolair (omalizumab): Drug Safety Communication - Slightly Elevated Risk of Cardiovascular and Cerebrovascular Serious Adverse Events

**AUDIENCE**: Allergy and Immunology, Pharmacy, Health Professional

**ISSUE**: An FDA review of safety studies suggests a slightly increased risk of problems involving the heart and blood vessels supplying the brain among patients being treated with the asthma drug Xolair (omalizumab) than in those who were not treated with Xolair. As a result, FDA has added information about these potential risks to the drug label.

The review found no difference in the rates of cancer between those patients being treated with Xolair and those who were not being treated with Xolair. However, due to limitations in the 5-year study, FDA cannot rule out a potential risk of cancer with Xolair, so this information was added to the Warnings and Precautions section of the drug label.

**BACKGROUND**: Xolair is an injectable medicine for patients 12 years of age and older with moderate to severe persistent allergic asthma whose asthma symptoms are not controlled by asthma medicines called inhaled corticosteroids.

**RECOMMENDATION**: Patients taking Xolair should continue to take the medication as prescribed and discuss any questions or concerns with their health care professionals.

Healthcare professionals and patients are encouraged to report adverse events or side effects related to the use of these products to the FDA's MedWatch Safety Information and Adverse Event Reporting Program:

- Complete and submit the report Online: [www.fda.gov/MedWatch/report.htm](http://links.govdelivery.com/track?type=click&enid=ZWFzPTEmbWFpbGluZ2lkPTIwMTQwOTI2LjM2NDAzMTcxJm1lc3NhZ2VpZD1NREItUFJELUJVTC0yMDE0MDkyNi4zNjQwMzE3MSZkYXRhYmFzZWlkPTEwMDEmc2VyaWFsPTE2OTYyMDQ2JmVtYWlsaWQ9Zm9vZGNvbnN1bWVyLm9yZ0BnbWFpbC5jb20mdXNlcmlkPWZvb2Rjb25zdW1lci5vcmdAZ21haWwuY29tJmZsPSZleHRyYT1NdWx0aXZhcmlhdGVJZD0mJiY=&&&100&&&http://www.fda.gov/MedWatch/report.htm?source=govdelivery&utm%5Fmedium=email&utm%5Fsource=govdelivery)
- [Download form](http://links.govdelivery.com/track?type=click&enid=ZWFzPTEmbWFpbGluZ2lkPTIwMTQwOTI2LjM2NDAzMTcxJm1lc3NhZ2VpZD1NREItUFJELUJVTC0yMDE0MDkyNi4zNjQwMzE3MSZkYXRhYmFzZWlkPTEwMDEmc2VyaWFsPTE2OTYyMDQ2JmVtYWlsaWQ9Zm9vZGNvbnN1bWVyLm9yZ0BnbWFpbC5jb20mdXNlcmlkPWZvb2Rjb25zdW1lci5vcmdAZ21haWwuY29tJmZsPSZleHRyYT1NdWx0aXZhcmlhdGVJZD0mJiY=&&&101&&&http://www.fda.gov/Safety/MedWatch/HowToReport/DownloadForms/default.htm?source=govdelivery&utm%5Fmedium=email&utm%5Fsource=govdelivery) or call [1-800-332-1088](tel:1-800-332-1088) to request a reporting form, then complete and return to the address on the pre-addressed form, or submit by fax to 1-800-FDA-0178

Read the MedWatch safety alert, including links to the Drug Safety Communication at: <[http://www.fda.gov/Safety/MedWatch/SafetyInformation/SafetyAlertsforHumanMedicalProducts/ucm416408.htm](http://www.fda.gov/Safety/MedWatch/SafetyInformation/SafetyAlertsforHumanMedicalProducts/ucm416408.htm?ref=foodconsumer.org)\>