Mechanism
How Benralizumab works
Binds the IL-5 receptor alpha subunit on eosinophils and basophils, leading to antibody-dependent cell-mediated cytotoxicity and near-complete eosinophil depletion.
← Respiratory Pharmacology
BIONBRC High Yield5/5 Importance
Benralizumab Respiratory Pharmacology Guide
Class, mechanism, indications, adverse effects, kinetics, exam traps, and NBRC-style study pearls.
Benralizumab is a monoclonal antibody used for severe eosinophilic asthma. Unlike mepolizumab, which binds IL-5 directly, benralizumab binds the IL-5 receptor and promotes eosinophil depletion. Students should recognize both medications as eosinophilic asthma biologics while understanding their different targets.
Clinical Pearl
What to remember
Mepolizumab hits IL-5. Benralizumab hits the IL-5 receptor.
Kinetics
Onset, peak, and duration
1
Onset
Weeks
2
Peak
Variable
3
Duration
Long-term biologic therapy
Quick facts
- Subclass
- Anti-IL-5 receptor monoclonal antibody
- NBRC importance
- 5/5
- Difficulty
- 4/5
- Brands
- Fasenra
Common indications
- Severe eosinophilic asthma
- Add-on maintenance therapy for eosinophilic asthma
Adverse effects
- Headache
- Injection site reactions
- Pharyngitis
- Fever
Contraindications
- Hypersensitivity to benralizumab or formulation components
Cautions and safety issues
- Not a rescue medication
- Monitor for hypersensitivity reactions
NBRC-style question
NBRC-style pharmacology review
A patient scenario involves severe eosinophilic asthma. Which medication concept should the respiratory therapy student recognize?
High-yield answer
Benralizumab = Anti-IL-5R
Interactive practice
Practice in PharmaGenius
Master this medication through adaptive review of class, mechanism, indications, adverse effects, exam traps, and clinical scenarios. Missed concepts can later be surfaced for targeted remediation.
ClassPractice
MechanismPractice
Clinical usePractice
Adverse effectsPractice
ScenarioPractice
Common Exam Traps
These are the answer choices, mechanisms, or medication classes most commonly confused with this medication on RT school and NBRC-style exams.
- Anti-IgE
- Anti-IL-5
- Anti-IL-4 receptor
- Bronchodilator
- Inhaled corticosteroid
High-Yield Clinical Scenarios
- Severe eosinophilic asthma
- Question distinguishing mepolizumab versus benralizumab
- Biologic target identification
Related study paths
Continue building pharmacology mastery
Use this medication page as a reference, then reinforce it with interactive practice and related PulmTools study resources.