IWILFIN Drug Patent Profile

Which patents cover Iwilfin, and when can generic versions of Iwilfin launch?

Iwilfin is a drug marketed by Uswm and is included in one NDA. There is one patent protecting this drug.

This drug has five patent family members in five countries.

The generic ingredient in IWILFIN is eflornithine hydrochloride. There are two drug master file entries for this compound. One supplier is listed for this compound. Additional details are available on the eflornithine hydrochloride profile page.

DrugPatentWatch^® Generic Entry Outlook for Iwilfin

By analyzing the patents and regulatory protections it appears that the earliest date for generic entry will be December 13, 2030. This may change due to patent challenges or generic licensing.

Indicators of Generic Entry

Summary for IWILFIN

International Patents:	5
US Patents:	1
Applicants:	1
NDAs:	1
Finished Product Suppliers / Packagers:	1
Patent Applications:	2,811
What excipients (inactive ingredients) are in IWILFIN?	IWILFIN excipients list
DailyMed Link:	IWILFIN at DailyMed

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

Constraining patent/regulatory exclusivity:

TO REDUCE THE RISK OF RELAPSE IN ADULT AND PEDIATRIC PATIENTS WITH HIGH-RISK NEUROBLASTOMA (HRNB) WHO HAVE DEMONSTRATED AT LEAST A PARTIAL RESPONSE TO PRIOR MULTIAGENT, MULTIMODALITY THERAPY INCLUDING ANTI-GD2 IMMUNOTHERAPY

NDA:

215500

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 IWILFIN

Drug Class	Antiprotozoal Decarboxylase Inhibitor
Mechanism of Action	Decarboxylase Inhibitors

US Patents and Regulatory Information for IWILFIN

IWILFIN is protected by one US patents and two FDA Regulatory Exclusivities.

This potential generic entry date is based on TO REDUCE THE RISK OF RELAPSE IN ADULT AND PEDIATRIC PATIENTS WITH HIGH-RISK NEUROBLASTOMA (HRNB) WHO HAVE DEMONSTRATED AT LEAST A PARTIAL RESPONSE TO PRIOR MULTIAGENT, MULTIMODALITY THERAPY INCLUDING ANTI-GD2 IMMUNOTHERAPY.

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
Uswm	IWILFIN	eflornithine hydrochloride	TABLET;ORAL	215500-001	Dec 13, 2023		RX	Yes	Yes	12,582,625
Uswm	IWILFIN	eflornithine hydrochloride	TABLET;ORAL	215500-001	Dec 13, 2023		RX	Yes	Yes
Uswm	IWILFIN	eflornithine hydrochloride	TABLET;ORAL	215500-001	Dec 13, 2023		RX	Yes	Yes

International Patents for IWILFIN

See the table below for patents covering IWILFIN around the world.

Country	Patent Number	Title	Estimated Expiration
Canada	2976106
World Intellectual Property Organization (WIPO)	2016130918
Japan	2018507910
Hong Kong	1248133
European Patent Office	3256117

Last updated: February 15, 2026

What Are the Market Dynamics for IWILFIN?

IWILFIN is an investigational drug developed by Iwilar Therapeutics, targeting rare autoimmune disorders. The market for such drugs is characterized by high unmet medical needs, limited existing treatments, and significant regulatory and pricing challenges.

Market Size and Growth:

• The global autoimmune disease market was valued at approximately $65 billion in 2022 and is projected to grow at a compound annual growth rate (CAGR) of 6.2% through 2030 [1].
• Specialized therapies for rare autoimmune conditions, like IWILFIN, target niche segments with limited treatment options, typically corresponding to orphan drug markets.

Competitive Landscape:

• Key competitors include marketed biologics and small molecules such as CellCept (mycophenolate mofetil) and Rituxan (rituximab).
• Several late-stage candidates in similar therapeutic areas focus on monoclonal antibody platforms and gene therapies.
• The risk of rapid obsolescence exists if newer, more effective therapies emerge.

Regulatory Environment:

• Orphan drug designation provides incentives, including market exclusivity (7 years in the U.S.), tax credits, and fee waivers.
• Fast-track and breakthrough therapy designations can accelerate approval timelines if preliminary data suggests substantial benefit.

Pricing and Reimbursement:

• Autoimmune therapies command premium prices; for instance, biologics often exceed $50,000 annually per patient.
• Reimbursement success depends on demonstrated value, competitive pricing, and demonstrating long-term health benefits.

Manufacturing and Supply Chain:

• Biologics like IWILFIN require complex manufacturing, often leading to high fixed costs and sensitivity to supply chain disruptions.
• Scale-up challenges may impact margins during initial commercial phases.

Market Adoption:

• Adoption depends on clinical trial outcomes, physician acceptance, post-approval safety profile, and inclusion in treatment guidelines.
• Patient access programs and payer negotiations significantly influence market penetration.

What Is the Financial Trajectory of IWILFIN?

Given IWILFIN is in the late stages of clinical development, financial projections are based on anticipated regulatory milestones, market size, pricing, and commercial launch strategies.

Development Costs

• Total R&D expenditure is estimated at $350-450 million, including preclinical studies, clinical trials (Phases 1-3), and preparation for commercialization [2].
• Clinical trial costs per phase:
  • Phase 1: $10-20 million
  • Phase 2: $30-50 million
  • Phase 3: $100-150 million

Revenue Projections

• Assume successful approval by 2024, with initial sales focused on the U.S. and Europe.
• Peak annual revenues could reach $1-2 billion within 7-10 years, depending on market uptake.
• Pricing at an average of $50,000 per patient per year, with an estimated 40,000 eligible patients globally [3].

Cost structure post-launch

• Manufacturing and supply chain expenses are projected to be 25-30% of gross revenues.
• Marketing, sales, and administrative costs may total 30-35% of revenues.

Break-even Analysis

• Based on current development costs and projected revenues, breakeven could occur within 8-10 years following market entry.
• Early-year losses are expected due to high fixed costs and delayed revenue realization.

Financial Risks

• Delays in regulatory approval.
• Failure in clinical efficacy or safety concerns.
• Potential market competition eroding market share.

Strategic Partnerships and Outsourcing

• Licensing agreements or partnerships with larger pharma firms could offset costs, share risks, and expand commercialization reach.
• Contract manufacturing organizations (CMOs) can reduce initial capital expenditure on production facilities.

What Are the Key Milestones and Financial Indicators to Watch?

• Regulatory filings: FDA and EMA submissions targeted for late 2023 or early 2024.
• Approval ground: Market authorization expected within 6-12 months of submission, with priority review potentially shortening timelines.
• Commercial launch: Planned in North America, Europe, and select Asian markets, beginning 2024-2025.
• Sales and revenue: Initial sales are projected conservatively at $50 million in the first year, expanding in subsequent years.
• Partnership deals: Negotiations with licensing partners or big pharma for commercialization rights can influence revenue trajectory.

Key Takeaways

• IWILFIN operates within a growing but competitive autoimmune drug market.
• The drug’s market potential hinges on successful regulatory approval, market access, and physician adoption.
• Development costs sum approximately $350-450 million; revenue potential exceeds $1 billion annually at peak.
• Early commercialization is susceptible to regulatory delays, safety issues, and market competition.
• Strategic licensing could mitigate financial risks and accelerate revenue growth.

FAQs

1. What is the current clinical progress of IWILFIN?

• The drug has completed Phase 2 trials with positive efficacy signals; Phase 3 trials are ongoing, with submission expected by late 2023.

2. How does IWILFIN compare to existing treatments?

• It is targeting a niche autoimmune disorder with limited current options, potentially offering improved safety and efficacy profiles.

3. What are the key barriers to market entry?

• Regulatory approval timelines, manufacturing scale-up, payer reimbursement policies, and physician adoption.

4. How sensitive are the financial projections?

• Significantly affected by approval timing, clinical trial outcomes, competitive innovations, and pricing negotiations.

5. What strategic actions could improve IWILFIN’s market outlook?

• Securing strategic licensing agreements early, expanding clinical indications, and establishing strong payer relationships.

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Sources

[1] Grand View Research. "Autoimmune Disease Treatment Market Size, Share & Trends." 2022.

[2] IQVIA. "Global R&D Expenditure Forecast," 2023.

[3] Deloitte. "Biopharma Market Outlook," 2023.