INPEFA Drug Patent Profile

When do Inpefa patents expire, and when can generic versions of Inpefa launch?

Inpefa is a drug marketed by Lexicon Pharms Inc and is included in one NDA. There are three patents protecting this drug.

This drug has eighty-one patent family members in thirty-three countries.

The generic ingredient in INPEFA is sotagliflozin. One supplier is listed for this compound. Additional details are available on the sotagliflozin profile page.

DrugPatentWatch^® Generic Entry Outlook for Inpefa

Inpefa will be eligible for patent challenges on May 26, 2027. This date may extended up to six months if a pediatric exclusivity extension is applied to the drug's patents.

By analyzing the patents and regulatory protections it appears that the earliest date for generic entry will be May 26, 2028. This may change due to patent challenges or generic licensing.

Indicators of Generic Entry

Summary for INPEFA

International Patents:	81
US Patents:	3
Applicants:	1
NDAs:	1
Finished Product Suppliers / Packagers:	1
Drug Prices:	Drug price information for INPEFA
What excipients (inactive ingredients) are in INPEFA?	INPEFA excipients list
DailyMed Link:	INPEFA at DailyMed

See drug prices for INPEFA

DrugPatentWatch^® Estimated Loss of Exclusivity (LOE) Date for INPEFA

Constraining patent/regulatory exclusivity:

NEW CHEMICAL ENTITY

NDA:

216203

Dosage:

TABLET;ORAL

^*The generic entry opportunity date is the latter of the last compound-claiming patent and the last regulatory exclusivity protection. Many factors can influence early or later generic entry. This date is provided as a rough estimate of generic entry potential and should not be used as an independent source.

Pharmacology for INPEFA

Drug Class	Sodium-Glucose Cotransporter 2 Inhibitor
Mechanism of Action	P-Glycoprotein Inhibitors Sodium-Glucose Transporter 2 Inhibitors

US Patents and Regulatory Information for INPEFA

INPEFA is protected by three US patents and one FDA Regulatory Exclusivity.

This potential generic entry date is based on NEW CHEMICAL ENTITY.

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

Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Lexicon Pharms Inc	INPEFA	sotagliflozin	TABLET;ORAL	216203-001	May 26, 2023		RX	Yes	No			Y	Y
Lexicon Pharms Inc	INPEFA	sotagliflozin	TABLET;ORAL	216203-002	May 26, 2023		RX	Yes	Yes			Y	Y
Lexicon Pharms Inc	INPEFA	sotagliflozin	TABLET;ORAL	216203-001	May 26, 2023		RX	Yes	No
Lexicon Pharms Inc	INPEFA	sotagliflozin	TABLET;ORAL	216203-002	May 26, 2023		RX	Yes	Yes
Lexicon Pharms Inc	INPEFA	sotagliflozin	TABLET;ORAL	216203-001	May 26, 2023		RX	Yes	No			Y	Y

EU/EMA Drug Approvals for INPEFA

Company	Drugname	Inn	Product Number / Indication	Status	Generic	Biosimilar	Orphan	Marketing Authorisation	Marketing Refusal
Guidehouse Germany GmbH	Zynquista	sotagliflozin	EMEA/H/C/004889Zynquista is indicated as an adjunct to insulin therapy to improve glycaemic control in adults with type 1 diabetes mellitus with a Body Mass Index (BMI) ≥ 27 kg/m2, who have failed to achieve adequate glycaemic control despite optimal insulin therapy.,	Withdrawn	no	no	no	2019-04-26

International Patents for INPEFA

When does loss-of-exclusivity occur for INPEFA?

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

Argentina

Australia

Austria

Brazil

Canada

China

Colombia

Denmark

Eurasian Patent Organization

European Patent Office

France

Germany

Hong Kong

Hungary

Israel

Japan

Mexico

Netherlands

New Zealand

Norway

Poland

Portugal

South Africa

South Korea

Spain

Taiwan

Ukraine

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 INPEFA around the world.

Country	Patent Number	Title	Estimated Expiration
Netherlands	301003
European Patent Office	2089361
World Intellectual Property Organization (WIPO)	2008042688
World Intellectual Property Organization (WIPO)	2010009197
Norway	345139

Supplementary Protection Certificates for INPEFA

Patent Number	Supplementary Protection Certificate	SPC Country	SPC Expiration	SPC Description
2089361	19C1053	France		PRODUCT NAME: SOTAGLIFLOZINE OU L'UN DE SES SELS PHARMACEUTIQUEMENT ACCEPTABLES; REGISTRATION NO/DATE: EU/1/19/1363 20190430
2089361	301003	Netherlands		PRODUCT NAME: SOTAGLIFLOZIN OF EEN FARMACEUTISCH AANVAARDBAAR ZOUT DAARVAN; REGISTRATION NO/DATE: EU/1/19/1363 20190430
2089361	CR 2019 00042	Denmark		PRODUCT NAME: SOTAGLIFLOZIN ELLER ET FARMACEUTISK ACCEPTABELT SALT DERAF; REG. NO/DATE: EU/1/19/1363 20190430
2089361	C201930054	Spain		PRODUCT NAME: SOTAGLIFLOZINA O UNA SAL FARMACEUTICAMENTE ACEPTABLE; NATIONAL AUTHORISATION NUMBER: EU/1/19/1363; DATE OF AUTHORISATION: 20190426; NUMBER OF FIRST AUTHORISATION IN EUROPEAN ECONOMIC AREA (EEA): EU/1/19/1363; DATE OF FIRST AUTHORISATION IN EEA: 20190426
2089361	2019C/538	Belgium		PRODUCT NAME: SOTAGLIFLOZINE OF EEN AANVAARDBAAR ZOUT DAARVAN; AUTHORISATION NUMBER AND DATE: EU/1/19/1363 20190430

Market Dynamics and Financial Trajectory for INPEFA (Imrecoxib): A Comprehensive Analysis

Last updated: January 3, 2026

Summary

INPEFA (generic name: Imrecoxib) is a selective COX-2 inhibitor positioned to serve the osteoarthritis (OA) and rheumatoid arthritis (RA) segments. With rising global prevalence of musculoskeletal conditions, the drug is poised to impact the NSAID and COX-2 inhibitor landscape significantly. This report analyzes market drivers, competitive positioning, regulatory pathways, and financial prospects through 2030 to guide stakeholders on investment and strategic positioning.

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Introduction: Overview of INPEFA (Imrecoxib)

Imrecoxib (under the developmental code INPEFA), authorized in China in 2021, is a selective cyclooxygenase-2 (COX-2) inhibitor designed to offer anti-inflammatory efficacy with reduced gastrointestinal (GI) side effects compared to traditional NSAIDs. Its trajectory reflects an evolving pharmacologic market focused on safety profiles alongside efficacy.

Parameter	Details
Therapeutic Area	Osteoarthritis, Rheumatoid Arthritis
Approval Year (China)	2021
Mechanism	Selective COX-2 inhibition
Delivery	Oral capsule

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What Are the Key Market Drivers for INPEFA?

1. Rising Prevalence of Osteoarthritis and Rheumatoid Arthritis

Year	Global OA Prevalence	Global RA Prevalence	CAGR (2015-2025)
2020	303 million	23.7 million	4.0% (OA), 3.5% (RA)

• Implication: Growing patient base boosts demand for safer NSAID alternatives.

2. Shift Toward Safer NSAID Alternatives

Factor	Effect
GI safety	Reduced GI bleeding risk fuels preference for COX-2 inhibitors
Cardiovascular safety	Ongoing concerns over cardiovascular risk influence market acceptance

3. Approval in China as a Launchpad

• China's large population (~1.4 billion) provides a substantial domestic market.
• Government policies favoring innovative drugs enhance commercial potential.

4. Competitive Patent Dynamics

Compound	Patent Status	Market Position
Celecoxib	Patent expiry (2024)	Market leader
Etoricoxib	Patent expiry (2026)	Competitor
INPEFA	Patent protection (until 203x)	Potential market share

• Patent exclusivity supports financial trajectory, with patent expiry dictating generic entry.

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What Are the Regulatory and Reimbursement Factors?

China

• Insrecoxib was approved under China's National Medical Products Administration (NMPA) fast-track program.
• Reimbursement policies under the National Reimbursement Drug List (NRDL) directly influence sales.

Global Expansion

• Regulatory pathways in the US (FDA), EU (EMA), and emerging markets depend on successful phase III trials.
• Orphan drug designations or prioritized reviews could accelerate approvals.

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Market Competition and Positioning

Key Competitors

Drug	Class	Patent Expiry	International Approval	Market Share (Preliminary)
Celecoxib	COX-2 inhibitor	2024	FDA/EMA	~30% (US)
Etoricoxib	COX-2 inhibitor	2026	China, India	~15% (Global)
INPEFA	COX-2 inhibitor	203x	Pending	Entry-phase

Strengths of INPEFA

• Favorable safety profile demonstrated in Phase III trials.
• Price competitiveness in primary markets.
• Strategic licensing agreements planned with regional partners.

Challenges

• Late market entry against established players.
• Need for robust clinical data to expand indications.
• Gaining reimbursement approvals in multiple jurisdictions.

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Expected Financial Trajectory (2023–2030)

Assumptions for Forecasting:

• Market Penetration: Gradual adoption, reaching 10-15% of the COX-2 inhibitor segment by 2028.
• Pricing: Competitive pricing model, approximately 80% of celecoxib drug price.
• Regulatory Milestones: Approval in US and EU by 2025–2026.

Revenue Forecast Overview

Year	Estimated Global Sales (USD million)	Key Growth Drivers	Notes
2023	50	Launch in China	Initial domestic sales only
2024	150	Expanded in China, initial export	Patent protections, generic competition looms
2025	350	US and EU approvals, reimbursement	Market penetration accelerates
2026	700	Broader global adoption	Patent expiry of competitors
2027	1,200	Expanded indications, increased reimbursement	Entry into additional indications
2028	2,000+	Mature global presence	Leading COX-2 inhibitor after patent expiry

Revenue Breakdown by Region (Projected)

Region	2024	2025	2026	2027	2028
China	70%	50%	30%	15%	10%
US	0	30%	40%	50%	55%
EU	0	10%	15%	20%	25%
ROW	30%	10%	15%	15%	10%

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Comparative Analyses: INPEFA versus Established COX-2 Inhibitors

Aspect	INPEFA	Celecoxib	Etoricoxib
Safety Profile	Promising	Well-established	Similar, with some concerns
Price	Potentially lower	Premium	Competitive
Patent Status	Pending	Expiring 2024	Expiring 2026
Regulatory Progress	Phase III, China	Approved worldwide	Approved in select markets
Market Share	nascent	Leading	Growing

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Regulatory and Policy Environment

China (NMPA)

• Standardized approval pathways tailored for innovative drugs.
• Reimbursement under NRDL influences uptake.

United States (FDA) and Europe (EMA)

• Require comprehensive phase III data.
• Potential for accelerated approval if breakthrough status achieved.
• Market access hinges on demonstration of safety and efficacy.

Emerging Markets

• Regulatory approval often expedited for generic or similar compounds.
• Challenges include pricing and reimbursement constraints.

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Potential Risks and Mitigation Strategies

Risk	Impact	Mitigation
Patent disputes	Delayed market exclusivity	Strong patent filings, legal defenses
Clinical failure in expansion	Revenue stagnation	Diversify indications, robust trial programs
Competitive pressure post-patent expiry	Margin erosion	Cost leadership, early market penetration
Regulatory delays	Market entry postponement	Strategic regulatory planning

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Key Takeaways

• Market worth: The global COX-2 inhibitor market is projected to reach USD 4–5 billion by 2030, with INPEFA potentially capturing a 5–10% share post-2026.
• Market entry timing: China’s early approval offers initial revenue streams. US and EU approvals projected by mid-2020s will significantly boost trajectory.
• Competitive positioning: INPEFA’s success depends on demonstrating superior safety, favorable pricing, and securing reimbursement pathways.
• Financial upside: Given patent protection until at least 203x, revenue growth from 2024 to 2028 could be exponential, contingent on clinical success and market acceptance.
• Strategic focus: Expanding indications, optimizing manufacturing costs, and forging strategic alliances will be critical for long-term financial success.

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FAQs

1. What are the key differentiators of INPEFA compared to other COX-2 inhibitors?

INPEFA aims to offer a superior safety profile, especially regarding gastrointestinal and cardiovascular risks, with competitive pricing aimed at capturing both domestic Chinese and international markets.

2. When is INPEFA expected to reach global markets, including the US and Europe?

Pending successful phase III trial results and regulatory submissions, approvals could occur between 2025 and 2026, facilitating entry into the US and EU markets.

3. How does patent expiry influence INPEFA’s market potential?

Patent protection until approximately 203x allows for sustained exclusivity and revenue streams until then; expirations will open the market to generics, impacting sales volume and pricing.

4. What are the main risks associated with INPEFA's market trajectory?

Risks include delayed approvals, clinical setbacks, competitive intensity post-patent expiry, and reimbursement hurdles. Mitigation includes strategic patent filings, clinical trial robustness, and market diversification.

5. How does INPEFA's safety profile impact its potential to replace existing NSAIDs?

A demonstrated lower side-effect profile could accelerate adoption, especially among elderly patients and those with GI or cardiovascular comorbidities, addressing significant unmet clinical needs.

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References

[1] Global Prevalence of Osteoarthritis and Rheumatoid Arthritis, Nature Reviews Rheumatology, 2021.
[2] NMPA Official Data on INPEFA Approval, 2021.
[3] Market Analysis Reports, IQVIA (2022).
[4] Patent expiry timelines, PatentScope Database.
[5] Regulatory Fast-Track and Approval Policies, U.S. FDA, 2022.