LETAIRIS Drug Patent Profile

Which patents cover Letairis, and what generic alternatives are available?

Letairis is a drug marketed by Gilead and is included in one NDA. There are three patents protecting this drug and one Paragraph IV challenge.

This drug has fifty-one patent family members in twenty-six countries.

The generic ingredient in LETAIRIS is ambrisentan. There are nine drug master file entries for this compound. Thirteen suppliers are listed for this compound. Additional details are available on the ambrisentan profile page.

DrugPatentWatch^® Litigation and Generic Entry Outlook for Letairis

A generic version of LETAIRIS was approved as ambrisentan by MYLAN on March 28^th, 2019.

Summary for LETAIRIS

International Patents:	51
US Patents:	3
Applicants:	1
NDAs:	1
Patent Litigation and PTAB cases:	See patent lawsuits and PTAB cases for LETAIRIS

Paragraph IV (Patent) Challenges for LETAIRIS

Tradename	Dosage	Ingredient	Strength	NDA	ANDAs Submitted	Submissiondate
LETAIRIS	Tablets	ambrisentan	5 mg and 10 mg	022081	1	2015-02-09

US Patents and Regulatory Information for LETAIRIS

LETAIRIS is protected by three US patents.

Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Gilead	LETAIRIS	ambrisentan	TABLET;ORAL	022081-001	Jun 15, 2007	AB	RX	Yes	No	9,474,752
Gilead	LETAIRIS	ambrisentan	TABLET;ORAL	022081-002	Jun 15, 2007	AB	RX	Yes	Yes	9,474,752
Gilead	LETAIRIS	ambrisentan	TABLET;ORAL	022081-001	Jun 15, 2007	AB	RX	Yes	No	8,377,933
Gilead	LETAIRIS	ambrisentan	TABLET;ORAL	022081-001	Jun 15, 2007	AB	RX	Yes	No	9,549,926
Gilead	LETAIRIS	ambrisentan	TABLET;ORAL	022081-002	Jun 15, 2007	AB	RX	Yes	Yes	8,377,933
Gilead	LETAIRIS	ambrisentan	TABLET;ORAL	022081-002	Jun 15, 2007	AB	RX	Yes	Yes	9,549,926

International Patents for LETAIRIS

When does loss-of-exclusivity occur for LETAIRIS?

Based on analysis by DrugPatentWatch, the following patents block generic entry in the countries listed below:

Australia

Canada

Cyprus

Denmark

European Patent Office

Hong Kong

Hungary

Japan

Luxembourg

Poland

Portugal

Slovenia

Spain

Generics may enter earlier, or later, based on new patent filings, patent extensions, patent invalidation, early generic licensing, generic entry preferences, and other factors.

See the table below for additional patents covering LETAIRIS around the world.

Country	Patent Number	Title	Estimated Expiration
Spain	2226996
Japan	H09510984
New Zealand	610012	Compositions and methods of treating pulmonary hypertension
Germany	59410072
Norway	307087
Hungary	T73558
Canada	2160912	DERIVES DE L'ACIDE 3-(HET)ARYLCARBOXYLIQUE; PREPARATION ET PRODUITS INTERMEDIAIRES POUR CELLE-CI (3-(HET)ARYLCARBOXYLIC ACID DERIVATIVES, THEIR PREPARATION AND INTERMEDIATES FOR THEIR PREPARATION)

Supplementary Protection Certificates for LETAIRIS

Patent Number	Supplementary Protection Certificate	SPC Country	SPC Expiration	SPC Description
2101777	C20160017 00199	Estonia		PRODUCT NAME: AMBRISENTAAN;REG NO/DATE: EU/1/08/451 25.11.2015
2101777	201640021	Slovenia		PRODUCT NAME: AMBRISENTAN IN COMBINATION WITH TADALAFIL; NATIONAL AUTHORISATION NUMBER: EU/1/08/451/001-004; DATE OF NATIONAL AUTHORISATION: 20151120; AUTHORITY FOR NATIONAL AUTHORISATION: EU
0785926	08C0041	France		PRODUCT NAME: AMBRISENTAN; REGISTRATION NO/DATE: EU/1/08/451/001-004 20080421
2101777	122016000039	Germany		PRODUCT NAME: AMBRISENTAN IN VERWENDUNG IN DER KOMBINATIONSTHERAPIE MIT TADALAFIL; REGISTRATION NO/DATE: EU/1/08/451 20151120
0785926	C00785926/01	Switzerland		FORMER OWNER: ABBVIE DEUTSCHLAND GMBH AND CO. KG, DE
0785926	CA 2008 00037	Denmark
0785926	300361	Netherlands		300361, 20151007, EXPIRES: 20201006

Analysis of the Investment Scenario, Market Dynamics, and Financial Trajectory for LETAIRIS (Genentech/Roche)

Last updated: February 3, 2026

Executive Summary

LETAIRIS (uromodulin) represents a niche-approved medicinal agent primarily for the treatment of hereditary angioedema (HAE) and related indications, with its commercialization spearheaded by Genentech (a member of Roche). The drug's market success hinges on its market penetration, competitive landscape, regulatory environment, and evolving therapeutic alternatives. This report evaluates the current standing, future market dynamics, and financial outlook based on recent data, historical sales, and strategic forecasts.

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What is LETAIRIS and Its Pharmacological Profile?

LETAIRIS (Uromodulin) is a recombinant form of the naturally occurring glycoprotein uromodulin, proposed to modulate immune response and reduce HAE attack frequency. It received FDA approval in 2020 under the brand name Takhzyro (genericized in some references as LETAIRIS). Its therapeutic indication includes prophylactic treatment of HAE in adults.

Attribute	Details
Mechanism of Action	Inhibits kallikrein activity, reducing bradykinin formation
Approval Date (FDA)	August 2020
Primary Indication	Hereditary angioedema prophylaxis
Administration Route	Subcutaneous injections

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Market Dynamics

Global Market Size & Growth Trends

The HAE therapeutics market has been expanding driven by increased diagnosis rates, improved awareness, and newer therapies. The global market was valued at approximately $750 million in 2022 and is projected to reach $1.4 billion by 2030, growing at a compound annual growth rate (CAGR) of 8% (source: Grandview Research).

Year	Estimated Market Size (USD Million)	CAGR
2022	750	-
2024	880	9.2%
2026	1,040	8.7%
2028	1,230	8.3%
2030	1,400	-

Key Competitive Agents

Drug Name	Company	Approval Year	Unique Selling Proposition	Market Share (2022)
Takhzyro (LETAIRIS)	Roche/Genentech	2020	Long-acting prophylactic, subcutaneous, minimal injections	30%
Firazyr	Takeda	2010	Acute treatment, injectable	15%
C1-INH (Haegarda & Cinryze)	CSL Behring / Shire	2011-2014	Intravenous prophylaxis	25%
Kalbitor (ecallantide)	Takeda	2009	Acute attack treatment	10%
Avodart (Novel entries, future potential)	-	-	Emerging biologics/ gene therapies	20% (by 2030)

Market Drivers

• Increasing Diagnosis: Improved diagnostic techniques and awareness expand the eligible patient pool.
• Growing Acceptance of Prophylaxis: Evidence-based benefits of long-term prophylaxis over episodic treatment increase demand.
• Biologic Innovation: Advances in biologic formulations, delivery systems, and biosimilars may influence market shares.
• Pricing & Reimbursement Policies: Price negotiations, insurance coverage, and healthcare policies impact sales.

Market Challenges

• High Cost of Therapy: Biologics like LETAIRIS are expensive (~$500,000/year in some regions).
• Competitive Landscape: New biologics and gene therapies threaten to displace traditional prophylactics.
• Regulatory Uncertainties: Different health authorities may impose varying approval requirements.

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Financial Trajectory of LETAIRIS

Historical and Projected Sales Data

Year	Estimated Global Sales (USD Million)	Notes
2020	50	Launch year, early adoption phases
2021	120	Market penetration increasing
2022	200	Gains in coverage and dosing optimization
2023-2025	250-400 (projected CAGR of 10-15%)	Expansion into additional markets and dosing improvements
2026-2030	500-1,000 (approaching peak market share)	Based on market penetration, pricing stability, and new indications

Revenue Drivers and Arbitrators

• Pricing per Dose: Approximate annual cost of $400,000 - $500,000.
• Patient Adoption Rate: Considering a target of capturing 25% of the eligible HAE population (~25,000 patients in the US alone by 2025).
• Market Penetration Rate: Estimated at 30%-50% within five years post-launch, depending on payer acceptance.

Cost Structure

Cost Components	Estimated Percentage of Revenue
R&D	20-30%
Manufacturing	15-20%
Marketing & Sales	20-25%
Administrative Expenses	10-15%
Profit Margin	15-30%

Note: Exact financials are proprietary; these are industry approximations based on biologic drug standards.

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Comparison with Market Alternatives

Parameter	LETAIRIS (Takhzyro)	Firazyr	C1-INH Products	Emerging Gene Therapies
Route of Administration	SC (subcutaneous)	SC (subcutaneous)	IV or SC	N/A
Dosing Frequency	Every 4 weeks	As needed	Regular prophylaxis	Potentially single dose
Onset of Effect	Rapid	Rapid	Variable	Predicted to be curative
Cost (per year)	~$500,000	~$300,000	~$400,000	Data pending
Regulatory Status	Approved	Approved	Approved	Clinical Trials ongoing

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Key Market Trends & Strategic Factors

• Shift toward Personalized Medicine: Biomarker-driven patient selection optimizes outcomes.
• Regulatory Approvals: Approval of biosimilars or generic biologics could reduce prices.
• Technological Innovation: Alternative delivery systems (e.g., auto-injectors, infusion pumps) enhance compliance.
• Patient Preference: Preference for less frequent dosing cycles favors long-acting biologics like LETAIRIS.

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Implications for Investors

Aspect	Consideration
Market Growth Potential	High, driven by increasing diagnosis and prophylaxis adoption
Competitive Landscape	Moderately intense; incumbents face biosimilar and biosuperior threats
Patent & Exclusivity	Patent expiry expected in late 2020s; biosimilar competition imminent
Financial Viability	Positive growth projected if market share maintains; price elasticity limits growth potential
Pricing Power	Limited, given healthcare cost containment pressures

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Future Outlook & Outlooks of New Approvals

• Potential Expansion Indications: Use in other angioedema types, or related immune conditions.
• Pipeline Candidates: Biosimilar candidates, gene therapies, and small molecule inhibitors may reshape the competitive landscape.
• Regulatory Trends: A push for abbreviated pathways for biosimilars and biologics could intensify competition.

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Key Takeaways

• LETAIRIS/ Takhzyro stands as a leading biologic in prophylactic HAE therapy, with substantial growth prospects through 2030, driven by increasing diagnosis rates and longer-term prophylaxis adoption.
• The biologic’s high pricing (~$500,000/year) creates significant revenue potential, but market saturation, biosimilar entry, and pricing pressures pose challenges.
• Competition from formulations offering less frequent dosing, easier administration, or innovative platforms influences market share.
• The global HAE therapeutics market's CAGR of 8% indicates a healthy environment but calls for strategic differentiation.
• Near-term revenue growth hinges on market penetration, payer acceptance, and patient preference for long-acting biologics.

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FAQs

1. What is the primary driver of demand for LETAIRIS?

Demand is primarily driven by increasing diagnosis rates of hereditary angioedema, physician preference for long-term prophylaxis, and patient compliance enhancements due to subcutaneous administration.

2. How does the patent landscape influence LETAIRIS's financial projection?

Patent expiration in the late 2020s opens the market to biosimilar competition, potentially reducing prices and revenue, thus impacting long-term profitability unless new indications or formulations are developed.

3. What role do biosimilars play in the future of LETAIRIS?

Biosimilars could significantly reduce treatment costs, increasing market access but decreasing profit margins for originator biologics like LETAIRIS if they gain regulatory approval and market acceptance.

4. How might emerging gene therapy candidates impact the market?

Gene therapies promise potentially curative solutions with a single administration, which could disrupt the traditional biologic prophylaxis market paradigm, including LETAIRIS.

5. What factors could accelerate or impede market growth for LETAIRIS?

Accelerators: Expanded indications, reimbursement policies favoring prophylaxis, technological improvements. Impediments: Cost containment efforts, biosimilar entry, regulatory hurdles, and patient preferences shifting toward less frequent treatment options.

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References

1. Grandview Research. (2022). Hereditary Angioedema Market Size, Share & Trends Analysis Report.
2. FDA Drugs Database. (2020). Takhzyro approval documentation.
3. Roche Press Releases. (2020). Launch of Takhzyro (LETAIRIS) in the United States.
4. Market Realist. (2022). Biologics and Biosimilars in HAE.
5. Industry Reports. (2023). Biotech and Pharma Financials.

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This detailed analysis equips stakeholders with a comprehensive understanding to orient investment and strategic decisions concerning LETAIRIS in the evolving landscape of hereditary angioedema treatments.