ADVAIR DISKUS 250/50 Drug Patent Profile

When do Advair Diskus 250/50 patents expire, and when can generic versions of Advair Diskus 250/50 launch?

Advair Diskus 250/50 is a drug marketed by Glaxo Grp Ltd and is included in one NDA.

The generic ingredient in ADVAIR DISKUS 250/50 is fluticasone propionate; salmeterol xinafoate. There are twenty-nine drug master file entries for this compound. Twelve suppliers are listed for this compound. Additional details are available on the fluticasone propionate; salmeterol xinafoate profile page.

DrugPatentWatch^® Litigation and Generic Entry Outlook for Advair Diskus 250/50

A generic version of ADVAIR DISKUS 250/50 was approved as fluticasone propionate; salmeterol xinafoate by HIKMA on December 17^th, 2020.

Summary for ADVAIR DISKUS 250/50

US Patents:	0
Applicants:	1
NDAs:	1

US Patents and Regulatory Information for ADVAIR DISKUS 250/50

Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Glaxo Grp Ltd	ADVAIR DISKUS 250/50	fluticasone propionate; salmeterol xinafoate	POWDER;INHALATION	021077-002	Aug 24, 2000	AB	RX	Yes	Yes

International Patents for ADVAIR DISKUS 250/50

See the table below for patents covering ADVAIR DISKUS 250/50 around the world.

Country	Patent Number	Title	Estimated Expiration
Austria	395427
Austria	395428
Austria	395429

Supplementary Protection Certificates for ADVAIR DISKUS 250/50

Patent Number	Supplementary Protection Certificate	SPC Country	SPC Expiration	SPC Description
0416951	12/1999	Austria		PRODUCT NAME: SALMETEROL, GEGEBENENFALLS IN FORM EINES PHARMAZEUTISCH ANNEHMBAREN SALZES, EINSCHLIESSLICH DES 1-HYDROXY-2-NAPHTHOATS (XINAFOAT) UND FLUTICASON PROPIONAT; NAT. REGISTRATION NO/DATE: 1-22897,1-22898, 1-22899,1-22900, 1-22901,1-22902 19990204; FIRST REGISTRATION: SE 14591-14596 19980907
2506844	SPC/GB18/020	United Kingdom		PRODUCT NAME: A PHARMACEUTICAL COMBINATION PRODUCT COMPRISING A PHARMACEUTICALLY ACCEPTABLE SALT OF UMECLIDINIUM (E.G. UMECLIDINIUM BROMIDE), VILANTEROL OR A PHARMACEUTICALLY ACCETPABLE SALT THEREOF (E.G. VILANTEROL TRIFENATATE), AND FLUTICASONE FUROATE; REGISTERED: UK EU/1/17/1236/001(NI) 20171117; UK EU/1/17/1236/002(NI) 20171117; UK EU/1/17/1236/003(NI) 20171117; UK PLGB 19494/0287 20171117
2506844	1890025-8	Sweden		PRODUCT NAME: COMBINATION OF A PHARMACEUTICALLY ACCEPTABLE SALT OF UMECLIDINIUM (E.G. UMECLIDINIUM BROMIDE), VILANTEROL OR A PHARMACEUTICALLY ACCEPTABLE SALT THEROF (E.G. VILANTEROL TRIFENATATE) AND FLUTICASONE FUROATE.; REG. NO/DATE: EU/1/17/1236 20171117

Adair Diskus 250/50—Investment and Fundamentals Analysis

Last updated: February 4, 2026

Overview

Adair Diskus 250/50 is a combination inhaler used to treat asthma and COPD. It includes fluticasone propionate (250 micrograms per inhalation) and salmeterol xinafoate (50 micrograms). Marketed primarily by GlaxoSmithKline (GSK), it faces regulatory, competitive, and patent-related influences that impact its valuation and investment prospects.

Regulatory Status and Patent Portfolio

GSK holds patents extending beyond 2025, with key expirations set for 2022-2023 in various major markets, including the U.S. and EU. Patent expiry opens pathways for generics, which could diminish sales. The FDA approved the drug with specific labeling for asthma and COPD, maintaining market exclusivity for its patent duration.

Market Dynamics and Competitive Landscape

The global respiratory market is projected to reach $47 billion by 2027, growing at a CAGR of approximately 4.5%[1]. Key competitors include AstraZeneca’s Symbicort and Novartis’ Airmax. Adair Diskus's market share remains around 30% within combination inhalers, with steady growth driven by COPD prevalence increases and asthma management guidelines.

Sales and Revenue Trends

In 2022, GSK reported global sales of approximately $2.3 billion for Adair Diskus, representing a 3% increase from 2021. The U.S. accounts for about 45% of total revenue, with Europe and emerging markets comprising the remainder. Revenue stability depends on generic entry timing and formulary positioning.

Patent Cliff Risks

Patent expiration could lead to generic competition, reducing prices by up to 70%, based on historical data for inhalers[2]. GSK’s pipeline includes new formulations and combination therapies to mitigate revenue erosion. Transition risks hinge on regulatory delays, market acceptance, and the efficacy of post-patent strategies.

R&D and Pipeline Developments

GSK invests approximately $4.8 billion annually in R&D, with pipeline products targeting new inhaler devices and formulations. Recent filings for a biosimilar and improved delivery systems aim to extend product lifecycle and maintain competitive differentiation.

Pricing and Reimbursement Policies

Pricing varies significantly across markets. In the U.S., insurers favor maintenance inhalers with established formulary coverage, supporting stable reimbursement. Countries like the UK and Canada have strict cost-effectiveness criteria, which could pressure margins post-generic entry.

Regulatory Challenges

Regulatory bodies have increased focus on device safety and bioequivalence, requiring substantial clinical data for generic versions. Approval timelines for generics have extended, influencing revenue projections.

Ownership and Licensing Agreements

GSK maintains manufacturing rights with strategic licensing agreements with third-party producers to ensure supply continuity. Any changes or disruptions could impact sales channels and market supply.

Keys Points for Investment Outlook

• Revenue stability relies heavily on patent protection and market share retention.
• Patent expiry risk is imminent within the next 1-2 years.
• Strategic pipeline development is critical to offset potential declines.
• Market expansion into emerging economies offers growth prospects but entails regulatory and reimbursement hurdles.
• The competitive landscape is consolidating, with potential mergers affecting pricing power.

Investment Implications

Investors should view Adair Diskus 250/50 as a mature asset facing near-term patent expiration risk but supported by ongoing R&D investments and market penetration in emerging regions. Valuations are sensitive to patent cliff timing, generic entry speeds, and the success of pipeline developments.

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Key Takeaways

• Patent expiration threatens revenue, but pipeline innovation could prolong lifecycle.
• Revenue depends on regional market dynamics, reimbursement policies, and competition.
• Market growth driven by COPD demographic trends and inhaler device improvements.
• Diversification into new formulations and delivery systems is vital for sustaining competitive advantage.
• Regulatory and patent landscapes influence long-term valuation.

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FAQs

1. What is the primary risk associated with investing in Adair Diskus 250/50?
Patent expiration within 1-2 years raises significant risk of generic competition, which can substantially reduce sales and margins.

2. How does competition impact the market share of Adair Diskus?
Competitors like Symbicort and Airmax offer alternative treatments. Market share is influenced by drug efficacy, pricing, and formulary positioning, where Adair maintains roughly 30% of the market in combination inhalers.

3. What are the prospects of pipeline products in mitigating revenue decline?
GSK’s pipeline, focusing on new inhaler formulations and combination therapies, aims to extend product lifecycle and maintain market relevance, but timelines are uncertain.

4. How do regional pricing and reimbursement policies affect profitability?
Pricing flexibility and reimbursement levels vary globally. Markets with strict cost controls, like the UK and Canada, may exert pressure on margins post-generic entry.

5. What strategic moves could prolong the commercial lifespan of Adair Diskus?
Innovative delivery devices, new formulations, and expansion into emerging markets, coupled with patent extensions or litigation strategies, can help sustain earnings.

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References

1. MarketandMarkets. “Respiratory Devices Market by Product, Application, Regional Outlook—Global Forecast to 2027.” 2022.
2. IMS Health Data. “Inhaler Patent Expiry Impact Analysis.” 2021.