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Benralizumab

Medically reviewed by Drugs.com. Last updated on Sep 8, 2020.

Pronunciation

(ben ra LIZ ue mab)

Dosage Forms

Excipient information presented when available (limited, particularly for generics); consult specific product labeling.

Solution Auto-injector, Subcutaneous [preservative free]:

Fasenra Pen: 30 mg/mL (1 mL)

Solution Prefilled Syringe, Subcutaneous [preservative free]:

Fasenra: 30 mg/mL (1 mL)

Brand Names: U.S.

  • Fasenra
  • Fasenra Pen

Pharmacologic Category

  • Interleukin-5 Receptor Antagonist
  • Monoclonal Antibody, Anti-Asthmatic

Pharmacology

Benralizumab, a humanized afucosylated, monoclonal antibody (IgG1, kappa) that binds to the alpha subunit of the interleukin-5 receptor. IL-5 is the major cytokine responsible for the growth and differentiation, recruitment, activation, and survival of eosinophils (a cell type associated with inflammation and an important component in the pathogenesis of asthma). Benralizumab, by inhibiting IL-5 signaling, reduces the production and survival of eosinophils and basophils through antibody dependent cell-mediated cytotoxicity; however, the mechanism of benralizumab action in asthma has not been definitively established.

Distribution

3.1 L (central); 2.5 L (peripheral)

Metabolism

Undergoes proteolytic degradation via enzymes that are widely distributed in the body and not restricted to hepatic tissue.

Excretion

Nonrenal

Half-Life Elimination

~15.5 days

Use: Labeled Indications

Asthma, severe: Add-on maintenance treatment of severe asthma in adults and children ≥12 years of age with an eosinophilic phenotype

Limitations of use: Not indicated for treatment of other eosinophilic conditions or for the relief of acute bronchospasm or status asthmaticus

Contraindications

Hypersensitivity to benralizumab or any component of the formulation

Dosing: Adult

Asthma, severe: SubQ: 30 mg every 4 weeks for the first 3 doses, and then once every 8 weeks.

Note: Use of benralizumab had an oral glucocorticoid-sparing effect in patients relying on oral glucocorticoids to manage severe asthma associated with eosinophilia (Nair 2017).

Dosing: Geriatric

Refer to adult dosing.

Dosing: Pediatric

Asthma, eosinophilic phenotype; add-on maintenance therapy: Children ≥12 years and Adolescents: SubQ: 30 mg every 4 weeks for the first 3 doses then once every 8 weeks

Reconstitution

Solution is clear to opalescent, colorless to slight yellow liquid; particles may be present in the solution that appear translucent or white to off-white; do not use if cloudy or discolored. Syringe may contain a small air bubble; do not expel the air bubble prior to administration. Refer to manufacturer's labeling for additional information.

Administration

SubQ: Prior to administration, allow syringe/autoinjector to warm at room temperature for ~30 minutes. Administer SubQ into the upper arm, thigh, or abdomen. Prefilled syringe should only be administered by a health care provider; autoinjector may be administered by patient or caregiver after proper training. Refer to the manufacturer's labeling for additional administration instructions.

Storage

Store in original carton at 2°C to 8°C (36°F to 46°F). Do not freeze or shake. Protect from light. May be stored at room temperature (≤25°C [77°F]) in original carton for ≤14 days.

Drug Interactions

There are no known significant interactions.

Adverse Reactions

>10%: Immunologic: Antibody development (13%; neutralizing: 12%)

1% to 10%:

Central nervous system: Headache (8%)

Respiratory: Pharyngitis (5%)

Miscellaneous: Fever (3%)

Postmarketing: Anaphylaxis, angioedema, hypersensitivity reaction

Warnings/Precautions

Concerns related to adverse effects:

• Hypersensitivity: Hypersensitivity reactions (eg, anaphylaxis, angioedema, urticaria, rash) may occur, typically within hours of administration. Delayed hypersensitivity reactions, occurring days after administration, have also been reported. Discontinue use in patients who experience a hypersensitivity reaction.

Disease-related concerns:

• Asthma: Not indicated for the treatment of acute asthma symptoms (eg, acute bronchospasm) or acute exacerbations, including status asthmaticus.

• Helminth infections: It is unknown if administration of benralizumab will influence a patient's immune response against parasitic infections. Therefore, patients with preexisting helminth infections should undergo treatment of the infection prior to initiation of benralizumab therapy. Patients who become infected during benralizumab treatment and do not respond to antihelminth therapy should discontinue benralizumab until the infection resolves.

Other warnings/precautions:

• Corticosteroids: Do not discontinue systemic or inhaled corticosteroids abruptly upon initiation of benralizumab. Reductions in corticosteroid dose should be gradual, if appropriate. Clinicians should note that a reduction in corticosteroid dose may be associated with withdrawal symptoms and/or unmask conditions previously suppressed by systemic corticosteroid therapy.

Monitoring Parameters

Anaphylaxis/hypersensitivity reactions (during and after administration); peak flow, and/or other pulmonary function tests; monitor for signs of infection

Pregnancy Considerations

Benralizumab is a humanized monoclonal antibody (IgG1). Placental transfer of human IgG is dependent upon the IgG subclass, maternal serum concentrations, newborn birth weight, and gestational age, generally increasing as pregnancy progresses. The lowest exposure would be expected during the period of organogenesis (Palmeira 2012; Pentsuk 2009).

Uncontrolled asthma is associated with adverse events on pregnancy (increased risk of perinatal mortality, preeclampsia, preterm birth, low-birth-weight infants, cesarean delivery, and the development of gestational diabetes). Poorly controlled asthma or asthma exacerbations may have a greater fetal/maternal risk than what is associated with appropriately used asthma medications. Maternal treatment improves pregnancy outcomes by reducing the risk of some adverse events (eg, preterm birth, gestational diabetes). Maternal asthma symptoms should be monitored monthly during pregnancy (ERS/TSANZ [Middleton 2020]; GINA 2020).

Use of monoclonal antibodies for the treatment of asthma in pregnancy may be considered when conventional therapies are insufficient; use of an agent other than benralizumab may be preferred (ERS/TSANZ [Middleton 2020]).

Data collection to monitor pregnancy and infant outcomes following exposure to benralizumab is ongoing. Health care providers are encouraged to enroll exposed pregnant females in the MotherToBaby Pregnancy Studies conducted by the Organization of Teratology Information Specialists (OTIS) (877-311-8972 or https://mothertobaby.org). Patients may also enroll themselves.

Patient Education

What is this drug used for?

• It is used to treat asthma.

• Do not use this drug to treat an asthma attack. Use a rescue inhaler. Talk with your doctor.

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

• Headache

• Sore throat

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

• Dizziness

• Passing out

• Trouble breathing

• Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.

Note: This is not a comprehensive list of all side effects. Talk to your doctor if you have questions.

Consumer Information Use and Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only the healthcare provider has the knowledge and training to decide which medicines are right for a specific patient. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a limited summary of general information about the medicine's uses from the patient education leaflet and is not intended to be comprehensive. This limited summary does NOT include all information available about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not intended to provide medical advice, diagnosis or treatment and does not replace information you receive from the healthcare provider. For a more detailed summary of information about the risks and benefits of using this medicine, please speak with your healthcare provider and review the entire patient education leaflet.

Further information

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

Related questions

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Consumer resources

Professional resources

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