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Generic Name: benralizumab (BEN ra LIZ ue mab)
Brand Names: Fasenra
Fasenra (benralizumab) is used to treat eosinophilic asthma. Includes Fasenra side effects, interactions and indications.
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Drug Information:
Fasenra (benralizumab) is a monoclonal antibody that affects the actions of the body's immune system. Benralizumab works by reducing levels of eosinophils, a certain type of white blood cell that may contribute to the symptoms of asthma. Fasenra injection is a prescription medicine used together with other asthma medicines to help control severe asthma in adults and children who are at least 12 years old. Fasenra is for people whose asthma is not well controlled with other medications. Before you receive Fasenra, tell your doctor about all your medical conditions or allergies, all medicines you use, and if you are pregnant or breast-feeding. Learn more

Fasenra Side Effects

Fasenra Side Effects

Note: This document contains side effect information about benralizumab. Some of the dosage forms listed on this page may not apply to the brand name Fasenra.

For the Consumer

Applies to benralizumab: subcutaneous solution

Along with its needed effects, benralizumab (the active ingredient contained in Fasenra) 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

  • Fast heartbeat
  • fever
  • hives, itching, or skin rash
  • hoarseness
  • irritation
  • joint pain, stiffness, or swelling
  • redness of the skin
  • swelling of the eyelids, face, lips, hands, or feet
  • tightness in the chest
  • troubled breathing or swallowing

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

  • Headache

Less common

  • Bleeding, blistering, burning, coldness, discoloration of skin, feeling of pressure, hives, infection, inflammation, itching, lumps, numbness, pain, rash, redness, scarring, soreness, stinging, swelling, tenderness, tingling, ulceration, or warmth at the injection site
  • body aches or pain
  • congestion
  • cough
  • dryness or soreness of the throat
  • runny nose
  • tender, swollen glands in the neck
  • voice changes

For Healthcare Professionals

Applies to benralizumab: subcutaneous solution


Frequency not reported: Anaphylaxis, angioedema


Frequency not reported: Immunogenicity


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


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


Common (1% to 10%): Pyrexia

Nervous system

Common (1% to 10%): Headache


Common (1% to 10%): Urticaria, rash

Editorial References and Review

Medically reviewed by BestRx Medical Team Last updated on 1/1/2020.

Source: Drugs.com Fasenra