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Benralizumab Side Effects

Medically reviewed by Philip Thornton, DipPharm. Last updated on Jun 18, 2023.

Applies to benralizumab: subcutaneous solution.

Serious side effects of Benralizumab

Along with its needed effects, benralizumab may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking benralizumab:

Less common

Incidence not known

Other side effects of Benralizumab

Some side effects of benralizumab may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

Less common

For Healthcare Professionals

Applies to benralizumab: subcutaneous solution.


Frequency not reported: Anaphylaxis, angioedema[Ref]


Frequency not reported: Immunogenicity[Ref]


Common (1% to 10%): Injection site reactions (e.g., pain, erythema, pruritus, papule)[Ref]


Common (1% to 10%): Pharyngitis (bacterial, viral, or streptococcal), cough[Ref]


Common (1% to 10%): Pyrexia[Ref]

Nervous system

Common (1% to 10%): Headache[Ref]


Common (1% to 10%): Urticaria, rash[Ref]

Frequently asked questions


1. Product Information. Fasenra (benralizumab). Astra-Zeneca Pharmaceuticals. 2017.

Further information

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

Some side effects may not be reported. You may report them to the FDA.