FASENRA Drug Profile

Summary for Tradename: FASENRA

High Confidence Patents:	7
Applicants:	1
BLAs:	1
Recent Clinical Trials:	See clinical trials for FASENRA

Recent Clinical Trials for FASENRA

Identify potential brand extensions & biosimilar entrants

Sponsor	Phase
Singapore General Hospital	Phase 2
University of Oxford	Phase 2
AstraZeneca	Phase 4

See all FASENRA clinical trials

Pharmacology for FASENRA

Mechanism of Action	Interleukin 5 Receptor alpha-directed Antibody Interactions
Established Pharmacologic Class	Interleukin-5 Receptor alpha-directed Cytolytic Antibody

Note on Biologic Patents

Matching patents to biologic drugs is far more complicated than for small-molecule drugs.

DrugPatentWatch employs three methods to identify biologic patents:

1. Brand-side disclosures in response to biosimilar applications

These patents were identified from disclosures by the brand-side company, in response to a potential biosimilar seeking to launch. They have a high certainty of blocking biosimilar entry. The expiration dates listed are not estimates — they're expiration dates as indicated by the brand-side company.

2. DrugPatentWatch analysis and company disclosures

These patents were identified from searching various sources, including drug labels and other general disclosures from the brand-side company. This list may exclude some of the patents which block biosimilar launch, and some of these patents listed may not actually block biosimilar launch. The expiration dates listed for these patents are estimates, based on the grant date of the patent.

3. Patents from broad patent text search

For completeness, these patents were identified by searching the patent literature for mentions of the branded or ingredient name of the drug. Some of these patents protect the original drug, whereas others may protect follow-on inventions or even inventions casually mentioning the drug. The expiration dates listed for these patents are estimates, based on the grant date of the patent.

1) High Certainty: US Patents for FASENRA Derived from Brand-Side Litigation

No patents found based on brand-side litigation

2) High Certainty: US Patents for FASENRA Derived from DrugPatentWatch Analysis and Company Disclosures

These patents were obtained from company disclosures

Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Patent No.	Estimated Patent Expiration	Source
Astrazeneca Ab	FASENRA	benralizumab	Injection	761070			DrugPatentWatch analysis and company disclosures
Astrazeneca Ab	FASENRA	benralizumab	Injection	761070			DrugPatentWatch analysis and company disclosures
Astrazeneca Ab	FASENRA	benralizumab	Injection	761070			DrugPatentWatch analysis and company disclosures
Astrazeneca Ab	FASENRA	benralizumab	Injection	761070			DrugPatentWatch analysis and company disclosures
Astrazeneca Ab	FASENRA	benralizumab	Injection	761070			DrugPatentWatch analysis and company disclosures
Astrazeneca Ab	FASENRA	benralizumab	Injection	761070			DrugPatentWatch analysis and company disclosures
Astrazeneca Ab	FASENRA	benralizumab	Injection	761070			DrugPatentWatch analysis and company disclosures

3) Low Certainty: US Patents for FASENRA Derived from Patent Text Search

These patents were obtained by searching patent claims

Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Patent No.	Estimated Patent Expiration	Source
Astrazeneca Ab	FASENRA	benralizumab	Injection	761070		2037-03-16	Patent claims search
Astrazeneca Ab	FASENRA	benralizumab	Injection	761070		2036-08-10	Patent claims search
Astrazeneca Ab	FASENRA	benralizumab	Injection	761070		2037-08-14	Patent claims search
Astrazeneca Ab	FASENRA	benralizumab	Injection	761070		2037-05-24	Patent claims search
Astrazeneca Ab	FASENRA	benralizumab	Injection	761070		2038-06-20	Patent claims search
Astrazeneca Ab	FASENRA	benralizumab	Injection	761070		2036-02-23	Patent claims search
Astrazeneca Ab	FASENRA	benralizumab	Injection	761070		2039-07-08	Patent claims search

Market Dynamics and Financial Trajectory for the Biologic Drug: FASENRA

Last updated: September 19, 2025

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Introduction

FASENRA (benralizumab) stands as a pivotal biologic therapeutic targeting severe eosinophilic asthma, introduced by AstraZeneca. Since its approval in 2017 by the U.S. FDA and subsequent authorization in multiple regions, FASENRA's commercial journey illustrates evolving market dynamics influenced by regulatory, clinical, and competitive factors. Understanding its financial trajectory requires analyzing its market penetration, competitive positioning, regulatory developments, and broader healthcare trends affecting biologic therapies.

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Market Overview and Indication Expansion

FASENRA is indicated for severe eosinophilic asthma, a subset representing approximately 10-15% of asthma cases but associated with significant morbidity. The biologic addresses unmet clinical needs by reducing exacerbations and corticosteroid use, thus occupying a critical niche within asthma management.

The biologic landscape for asthma has expanded recently with the advent of other monoclonal antibodies such as Nucala (mepolizumab), Cinqair (reslizumab), and Dupixent (dupilumab). Nevertheless, FASENRA's mechanism of targeting the IL-5 receptor confers particular clinical benefits, especially in patients with eosinophil-driven disease phenotypes.

The drug’s initial approval was limited to adult patients, but recent regulatory filings aim to extend indications to pediatric populations, promising future revenue expansion. Moreover, quality-of-life improvements and cost-benefit advantages position FASENRA favorably among clinicians, potentially aiding its market share growth.

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Market Penetration and Key Drivers

FASENRA's commercial success depends significantly on physician adoption, reimbursement frameworks, and competitive dynamics.

• Physician Adoption: Clinical data demonstrating efficacy in reducing exacerbations and steroid dependence have fostered prescribing confidence. The drug's once-monthly subcutaneous administration enhances patient adherence, a crucial factor in serious asthma management.

• Reimbursement and Pricing: Reimbursement policies influence access; AstraZeneca has engaged in strategic collaborations with payers to secure favorable formulary positioning. The drug commands premium pricing reflective of its biologic innovation, which impacts overall market penetration.

• Patient Access and Healthcare Infrastructure: The integration of FASENRA into treatment guidelines, especially after revisions by bodies such as GINA (Global Initiative for Asthma), facilitates wider usage. Specialty clinics equipped for subcutaneous injections also contribute to its adoption.

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Competitive Landscape and Market Share Dynamics

FASENRA operates amid a competitive biologic arena, with Nucala and Cinqair being notable competitors. Dupixent, although primarily indicated for atopic dermatitis and other conditions, has entered asthma therapy, challenging FASENRA’s market position.

• Differentiating Factors: FASENRA’s IL-5 receptor blockade provides a slightly distinct mechanism from IL-5 ligand inhibitors, potentially influencing clinician choice in certain patient subsets.

• Market Shares: As of early 2023, FASENRA has captured approximately 15-20% of the biologic asthma market, with steady growth driven by expanded indications and increased physician familiarity. The growth rate is estimated at 8-12% annually, contingent on regulatory approvals and competitive moves.

• Emerging Competition: Biosimilars are currently not a factor in this market but could influence pricing strategies in the future, especially as patent exclusivity periods near expiration.

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Regulatory and Pharmacovigilance Developments

Regulatory agencies globally are scrutinizing biologics like FASENRA for safety signals, particularly hypersensitivity reactions and eosinophilic conditions. As AstraZeneca accumulates post-market data, potential label updates could influence formulary decisions and market access.

The recent submission of pediatric extension data is anticipated to expand FASENRA’s market, with regulatory decisions expected in the next 12-18 months. An expanded label would directly impact revenue projections.

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Financial Trajectory and Revenue Forecasts

AstraZeneca's fiscal reports indicate FASENRA's revenue contributions have grown from approximately $250 million in 2018 to over $1.2 billion in 2022, reflecting compound annual growth approaching 70% during initial years and stabilizing around 15-20% subsequently [1].

Forecasts project revenues reaching $2-2.5 billion by 2025, driven by:

• Broader indication approvals, notably pediatric use
• Increased patient penetration in existing markets (U.S., EU, Japan)
• Strategic geographic expansion, including emerging markets
• Policy shifts favoring biologic therapies in asthma management

Cost inflation related to manufacturing innovations and supply chain investments remains manageable but warrants monitoring for gross margins.

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Market Challenges and Opportunities

Challenges:

• Intense Competition: The entrance of alternative biologics and potential biosimilars could pressure prices.
• Pricing and Reimbursement: Cost containment efforts and stricter payer policies threaten revenue growth.
• Clinical Development Risks: Future trials for combination therapies or new indications could alter the competitive landscape.

Opportunities:

• Expansion into Comorbid Conditions: Investigating efficacy in other eosinophilic diseases like eosinophilic esophagitis can diversify revenue streams.
• Personalized Medicine Approaches: Biomarker-driven patient selection enhances treatment outcomes and supports payer-sponsored adoption.
• Digital and Patient Engagement Strategies: Telehealth integration and adherence programs could improve patient retention and treatment efficiency.

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Global Market Outlook

While North America dominates FASENRA sales, growth prospects overseas are robust due to expanding healthcare infrastructure, rising asthma prevalence, and increasing clinician awareness. The Asian-Pacific region, especially Japan and China, presents significant upside; however, access and pricing policies vary.

Local regulatory approvals, patent landscapes, and healthcare policies will influence the pace and scale of global expansion, with AstraZeneca actively tailoring its strategies to each region.

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Key Takeaways

• FASENRA’s growth is anchored in its clinical benefits, targeted indication, and strategic positioning amidst a competitive biologic market.
• Revenue forecasts project a trajectory toward $2 billion or more by 2025, supported by ongoing regulatory approvals and expanded patient access.
• Market challenges include payer pressures, competition, and regulatory hurdles, but opportunities in additional indications and emerging markets persist.
• Continued innovation and clinical research will be pivotal in maintaining FASENRA’s competitive edge and revenue momentum.
• Partnering with healthcare systems to enhance patient adoption and adherence can unlock further growth.

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FAQs

1. What are the primary clinical advantages of FASENRA over competitors?
FASENRA's IL-5 receptor blockade offers direct eosinophil depletion, reducing exacerbations and corticosteroid dependence more effectively in certain patient subsets compared to IL-5 ligand inhibitors.

2. How does regulatory approval impact FASENRA’s financial prospects?
Expanded approvals, particularly for pediatric indications, will significantly boost patient eligibility, increasing revenue potential. Conversely, delays or rejections could limit growth.

3. What role do reimbursement policies play in FASENRA’s market penetration?
Reimbursement strategies determine patient access; favorable policies facilitate higher adoption, while restrictive policies can constrain revenue.

4. How might biosimilar entry influence FASENRA’s long-term profitability?
Although biosimilars are not yet prevalent, their potential entry could lead to price erosion, emphasizing the importance of patent protections and brand loyalty.

5. What emerging markets present opportunities for FASENRA growth?
Regions like Asia-Pacific, Latin America, and the Middle East offer expanding asthma populations and increasing healthcare investments, presenting strategic opportunities for market expansion.

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References

[1] AstraZeneca Annual Report 2022.
[2] Global Initiative for Asthma (GINA) Guidelines, 2022.
[3] IMS Health Data, 2022.