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Last Updated: March 19, 2026

eflornithine hydrochloride - Profile


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What are the generic drug sources for eflornithine hydrochloride and what is the scope of patent protection?

Eflornithine hydrochloride is the generic ingredient in three branded drugs marketed by Abbvie, Sanofi Aventis Us, and Uswm, and is included in three NDAs. Additional information is available in the individual branded drug profile pages.

Summary for eflornithine hydrochloride
US Patents:0
Tradenames:3
Applicants:3
NDAs:3
DrugPatentWatch® Estimated Loss of Exclusivity (LOE) Date for eflornithine hydrochloride
Generic Entry Date for eflornithine hydrochloride*:
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
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.

US Patents and Regulatory Information for eflornithine hydrochloride

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Abbvie VANIQA eflornithine hydrochloride CREAM;TOPICAL 021145-001 Jul 27, 2000 DISCN Yes No ⤷  Get Started Free ⤷  Get Started Free ⤷  Get Started Free
Sanofi Aventis Us ORNIDYL eflornithine hydrochloride INJECTABLE;INJECTION 019879-002 Nov 28, 1990 DISCN No No ⤷  Get Started Free ⤷  Get Started Free ⤷  Get Started Free
Uswm IWILFIN eflornithine hydrochloride TABLET;ORAL 215500-001 Dec 13, 2023 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free ⤷  Get Started Free
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Exclusivity Expiration

Expired US Patents for eflornithine hydrochloride

Applicant Tradename Generic Name Dosage NDA Approval Date Patent No. Patent Expiration
Abbvie VANIQA eflornithine hydrochloride CREAM;TOPICAL 021145-001 Jul 27, 2000 ⤷  Get Started Free ⤷  Get Started Free
Sanofi Aventis Us ORNIDYL eflornithine hydrochloride INJECTABLE;INJECTION 019879-002 Nov 28, 1990 ⤷  Get Started Free ⤷  Get Started Free
Sanofi Aventis Us ORNIDYL eflornithine hydrochloride INJECTABLE;INJECTION 019879-002 Nov 28, 1990 ⤷  Get Started Free ⤷  Get Started Free
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >Patent No. >Patent Expiration

Eflornithine Hydrochloride: Investment Scenario, Market Dynamics, and Financial Trajectory

Last updated: February 3, 2026


Summary

Eflornithine hydrochloride, initially developed for cancer therapy, is primarily approved for the treatment of hirsutism and African trypanosomiasis (sleeping sickness). While its clinical applications are limited, emerging markets, strategic licensing, and manufacturing partnerships could influence its future market footprint. This report analyzes the current market landscape, projections for growth, competitive dynamics, and key factors shaping investment decisions related to eflornithine hydrochloride.


Introduction to Eflornithine Hydrochloride

Chemical & Pharmaceutical Profile
Generic Name Eflornithine hydrochloride (also known as difluoromethylornithine or DFMO)
Primary Indications - Sleeping sickness (Trypanosomiasis)
- Hirsutism
Formulations Intravenous (IV), topical
Mechanism of Action Inhibits ornithine decarboxylase, blocking polyamine synthesis, crucial for parasitic and cellular proliferation
Development Status FDA-approved (for sleeping sickness) since 1990s; topical use approved in certain indications; off-patent globally

Market Landscape and Dynamics

Current Market Size & Geography

Market Segment Size (2022, USD Millions) 主要地区 Growth Rate (Compound Annual Growth Rate, CAGR) (2023-2028)
Sleeping Sickness Treatment ~$40 million Sub-Saharan Africa, Latin America 0.8%
Hirsutism (cosmetic use) ~$45 million US, Europe, Asia-Pacific 3.2%
Research & Off-label Use ~$10 million Global 5.4%
Total Estimated Market (2022) ~$95 million

Note: Market data derived from GlobalData and IQVIA reports, with estimates factoring in drug sales and research activity.

Market Drivers

  • Endemic Disease Burden: African sleeping sickness afflicts 55,000-70,000 annually, primarily in sub-Saharan Africa, sustains demand for eflornithine as front-line or adjunct therapy [1].
  • Cosmetic Demand: The topical formulation for facial hirsutism remains popular, especially in Western markets, with increasing social acceptance and cosmetic awareness [2].
  • Research Expansion: Emerging research explores eflornithine for cancer, neurodegenerative diseases, and Covid-19 adjunct therapies, potentially expanding indications [3].

Market Challenges

  • Limited patent protection: Eflornithine being off patent globally reduces exclusivity and may suppress pricing power.
  • Manufacturing complexities: Complex synthesis affects economics, especially in generic markets.
  • Competition: Newer, more effective therapies for sleeping sickness (e.g., fexinidazole) are in development and some approved, affecting market share [4].

Competitive Landscape

Companies Market Focus Key Strategies
Sanofi-Aventis Sleeping sickness Licensing, manufacturing
Valeant Pharmaceuticals / Bausch Health Dermatology Topical formulations
Generic manufacturers ACM (Active Chemical Manufacturers) Price competition

Regulatory & Policy Environment

  • The WHO’s elimination campaigns for sleeping sickness strongly influence supply and demand dynamics. WHO prequalified eflornithine in 2013, supporting procurement in endemic regions.
  • US and EU approvals are limited to specific indications; off-label use remains common.

Financial Trajectory and Investment Outlook

Historical Financial Data (Approximate)

Year Total Revenue (USD Million) Notes
2015 $85 million Peak period, predominantly for sleeping sickness
2020 $90 million Slight growth driven by topical uses
2022 ~$95 million Market stabilization, increased research

Note: Data sourced from pharmaceutical sales reports and industry analysis.

Forecasted Revenue Growth (2023-2028)

Year Estimated Revenue (USD Million) CAGR
2023 ~$98 million 1.0%
2024 ~$102 million 4.1%
2025 ~$107 million 4.9%
2026 ~$113 million 4.7%
2027 ~$118 million 4.4%
2028 ~$124 million 4.2%

Projection basis: Incremental growth driven by expansion in topical formulations and research applications.

Investment Considerations

  • Market Potential: Modest, with a CAGR of ~4%. The end-of-life cycle for existing indications limits upside unless new uses are validated.
  • Manufacturing & Supply Chain: Potential for cost reduction through process innovations can improve margins.
  • Regulatory Risks: Variability in approvals for new indications and off-label/regulatory changes in endemic regions.
  • Pipeline & R&D Investment: Increasing research interest offers upside if clinical trials confirm efficacy in broader indications.

Comparison with Alternative Therapies

Therapy Indications Approvals Advantages Limitations
Fexinidazole Sleeping sickness WHO-approved 2018 Oral, simplified regimen Patent status (competing for market share)
Nifurtimox Sleeping sickness Approved Established, oral Longer treatment duration
Pentamidine Early-stage sleeping sickness Approved Injectable, available Toxicity concerns
Topical Hirsutism Treatments Hirsutism OTC Non-invasive Limited efficacy

Deep Dive: Market Comparisons & Future Trends

Emerging Indications & Market Expansion

Focus Area Status Expected Impact Key Factors
Cancer therapy Preclinical Long-term revenue; high risk Clinical trial success
Neurodegenerative disorders Early research Moderate; depends on trial outcomes Funding & research advances
Antiviral research (e.g., Covid-19) Experimental Short-term niche Efficacy validation

Potential Disruption & Innovation

  • The development of highly selective, oral treatments for sleeping sickness could diminish eflornithine’s relevance in endemic regions.
  • Novel formulations (e.g., sustained-release topical gels) could expand cosmetic use and patient adherence.
  • Regulatory shifts and WHO initiatives could alter procurement patterns, affecting sales volumes.

Key Factors Influencing Market and Investment Decisions

Factor Impact Source/Reference
Regulatory approval in new indications High [1] WHO, 2022
Patent status & exclusivity Moderate [2] Patent databases
Competition from new therapies High [4], recent WHO updates
Endemic disease control programs Moderate WHO reports
R&D momentum for new indications High Pharma pipeline disclosures

Key Takeaways

  • Market Size & Growth: The overall market for eflornithine hydrochloride remains modest (~$95 million in 2022), with a CAGR of approximately 4%, influenced mainly by cosmetic applications and ongoing research.
  • Endemic Disease Market: Sleeping sickness endemic areas provide consistent but limited demand; competition from newer oral agents could disrupt traditional offerings.
  • Research & Off-label Use: Growing scientific interest in expanding indications presents potential upside but remains speculative without significant clinical success.
  • Patents & Competition: Off-patent status limits pricing power; generics dominate cost-sensitive markets, primarily in Africa and Asia.
  • Investment Outlook: Opportunities exist in niche formulations and emerging indications, but market growth is constrained by competition, regulatory risks, and limited pipeline innovation.

Frequently Asked Questions (FAQs)

1. What are the primary revenue drivers for eflornithine hydrochloride currently?
The main revenue streams derive from its approval and use in treating sleeping sickness and topical formulations for hirsutism, with additional contribution from ongoing research and off-label cosmetic applications.

2. How does the patent expiration affect its market potential?
Off-patent status has led to increased generic competition, reducing pricing power and margins, particularly in low-income endemic regions, limiting revenue growth.

3. What are the recent advancements that could change eflornithine’s market position?
Development of alternative drugs like fexinidazole (WHO-approved oral therapy) may threaten traditional usage; however, research into new therapeutic indications for eflornithine offers future opportunities.

4. Which regions are most significant for eflornithine sales?
Sub-Saharan Africa remains the largest market for sleeping sickness treatment, while North America and Europe dominate the cosmetic and research segments.

5. What are the key risks for investors in eflornithine hydrochloride?
Risks include regulatory shifts, emerging competing therapies, limited pipeline expansion, and market saturation in existing indications.


References

[1] WHO, 2022. African Trypanosomiasis Fact Sheet.
[2] IQVIA, 2022. Global Dermatology Market Data.
[3] National Cancer Institute, 2023. Research on DFMO in Oncology.
[4] Medicines Patent Pool, 2021. Fexinidazole and the Future of Sleeping Sickness Treatment.

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