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Last Updated: December 12, 2025

ENFLURANE Drug Patent Profile


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

Enflurane is a drug marketed by Abbott and Piramal Critical and is included in two NDAs.

The generic ingredient in ENFLURANE is enflurane. There are three drug master file entries for this compound. Additional details are available on the enflurane profile page.

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Summary for ENFLURANE
US Patents:0
Applicants:2
NDAs:2
Raw Ingredient (Bulk) Api Vendors: 59
Clinical Trials: 3
DailyMed Link:ENFLURANE at DailyMed
Drug patent expirations by year for ENFLURANE
Recent Clinical Trials for ENFLURANE

Identify potential brand extensions & 505(b)(2) entrants

SponsorPhase
University of LeipzigPhase 4
RWTH Aachen UniversityPhase 4
Penn State UniversityPhase 4

See all ENFLURANE clinical trials

Medical Subject Heading (MeSH) Categories for ENFLURANE
Anatomical Therapeutic Chemical (ATC) Classes for ENFLURANE

US Patents and Regulatory Information for ENFLURANE

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Abbott ENFLURANE enflurane LIQUID;INHALATION 070803-001 Sep 8, 1987 DISCN No No ⤷  Get Started Free ⤷  Get Started Free ⤷  Get Started Free
Piramal Critical ENFLURANE enflurane LIQUID;INHALATION 074396-001 Jul 29, 1994 DISCN No No ⤷  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

Market Dynamics and Financial Trajectory for ENFLURANE: A Comprehensive Analysis

Last updated: July 28, 2025


Introduction

Enflurane, a volatile inhalational anesthetic agent, has historically held a crucial role within the perioperative landscape. Its pharmacokinetic profile, clinical utility, and evolving regulatory environment influence its market position. This analysis examines the intricate market dynamics and forecasted financial trajectory of enflurane within the broader anesthetic drug market, highlighting factors that influence its adoption, competitive positioning, and future growth potential.


Pharmacological Profile and Clinical Utility

Enflurane’s primary application centers on induction and maintenance of general anesthesia. Its rapid onset, controllable depth of anesthesia, and relatively predictable recovery profile underpin its clinical usage. However, concerns over neurotoxicity, potential cardiopulmonary side effects, and the advent of newer agents with superior safety profiles have curtailed its prominence (1).

The advent of modern inhalational anesthetics—such as sevoflurane and desflurane—has displaced enflurane in many markets. Nevertheless, enflurane remains in use where older infrastructure persists, or in regions with limited access to newer agents, maintaining a niche market.


Global Market Dynamics

Market Size and Regional Composition

The global inhalational anesthetic market is projected to reach USD 1.3 billion by 2027, growing at a compound annual growth rate (CAGR) of approximately 4.2% since 2021 (2). Enflurane’s market share remains marginal due to replacements by newer agents and safety concerns. The Asia-Pacific region, characterized by cost-sensitive healthcare systems, continues to exhibit some residual demand for enflurane, particularly in low- and middle-income countries.

Key Drivers

  • Cost and Infrastructure Constraints: Many developing economies lack the financial capacity or infrastructure for newer, more expensive agents, sustaining demand for existing agents like enflurane.
  • Regulatory Environment: Stringent regulatory policies in North America and Europe favor modern agents with better safety profiles, constraining enflurane’s market presence.
  • Supply Chain and Manufacturing Factors: The limited number of players producing enflurane has stabilized supply but also raised concerns over potential shortages, especially if production ceases.

Market Challenges

  • Safety and Side Effect Profiles: Enflurane’s association with neurotoxicity and seizure risk reduces its appeal among clinicians favoring safer alternatives.
  • Environmental Impact: Hyperventilation concerns and greenhouse gas emissions from inhalational anesthetics have prompted regulatory scrutiny, negatively impacting older agents like enflurane (3).
  • Competitive Landscape: The dominance of sevoflurane and desflurane, with their rapid onset and minimal side effects, tightens the grip on market share.

Financial Trajectory and Forecast

Revenue Trends

Given its declining clinical adoption, enflurane’s revenue is waning consistently. Market data suggests that enflurane accounts for less than 2% of the global inhalational anesthetic sales volume (2). The revenue trajectory is characterized by gradual erosion, with potential for negligible further decline unless influenced by specific regional or institutional demands.

Pricing Dynamics

Pricing for enflurane remains relatively stable but competitive pressures limit significant increases. Regulatory and safety concerns restrict the ability to justify premium pricing, especially with the availability of advanced alternatives.

R&D and Innovation Impact

No recent significant R&D initiatives specifically target enflurane, and pharmaceutical companies have largely shifted focus toward developing novel anesthetic agents with improved safety and environmental profiles. Such strategic realignment diminishes the prospects of enflurane's clinical resurgence and curtails its investment appeal.

Market Exit Risks

Producers may phase out enflurane production due to cost-inefficiencies, low demand, and regulatory impediments. The potential for market exit increases, mirroring trends observed in older anesthetics like halothane.


Regulatory and Environmental Considerations

Regulatory agencies increasingly enforce policies targeting the environmental footprint of anesthetic agents (4). Enflurane, classified among potent greenhouse gases, faces potential bans or restrictions, further constraining its market scope.

The Kyoto Protocol and subsequent protocols generate economic disincentives for agents with high global warming potential, pressuring manufacturers to cease production or transition toward greener alternatives.


Emerging Opportunities and Market Outlook

While traditional use diminishes, niche applications or regional demands may temporarily sustain enflurane sales. Nonetheless, projections indicate a continued decline, with the global anesthetic market favoring newer, safer agents. The trajectory suggests a gradual phase-out pattern unless significant technological or safety breakthroughs occur.

Strategic Implications for Stakeholders

  • Manufacturers should evaluate the cost-benefit profile of continuing enflurane production, considering regulatory risks and market demand.
  • Healthcare providers must balance existing stock utilization against transitioning toward safer, environmentally sustainable agents.
  • Regulators may implement policies that accelerate decommissioning of outdated anesthetics, encouraging innovation in greener alternatives.

Key Takeaways

  • Market Decline: Enflurane’s global market share has substantially diminished due to safety concerns, regulatory restrictions, and the advent of superior inhalational agents.
  • Limited Growth Prospects: The financial trajectory indicates a continued decline with minimal prospects for significant recovery or growth.
  • Regional Variability: Despite global trends, some low-income regions persist in utilizing enflurane, driven by cost and infrastructure limitations.
  • Environmental Concerns: Regulatory pressures related to greenhouse gas emissions foreclose future reintroduction or significant utilization.
  • Strategic Exit Likelihood: Industry stakeholders may phase out production, aligning with global movements toward safer and environmentally friendly anesthetic options.

FAQs

1. Why has the clinical use of enflurane declined worldwide?
The decline is primarily due to safety concerns (e.g., neurotoxicity, seizure risk), the introduction of newer agents like sevoflurane and desflurane with superior safety and pharmacokinetic profiles, and regulatory restrictions addressing environmental impacts.

2. What regions still utilize enflurane, and why?
Some low- and middle-income countries continue to use enflurane owing to affordability, existing infrastructure, and lack of access to or regulatory approval for newer agents.

3. How do environmental regulations impact the future of enflurane?
As potent greenhouse gases, inhalational anesthetics face increasing regulatory restrictions. Enflurane’s high global warming potential accelerates its potential phase-out in favor of greener alternatives.

4. Is there any ongoing R&D to revive or improve enflurane?
Currently, no significant R&D focuses on enflurane. Industry efforts concentrate on developing next-generation anesthetics with improved safety and environmental profiles.

5. What is the outlook for companies producing enflurane?
Most producers are likely to phase out enflurane production due to diminishing demand, regulatory barriers, and the shift toward environmentally friendly drugs, potentially leading to market exit.


References

  1. Absalom, A., Kenny, G. N. (2020). Inhalational Anesthetics: Pharmacodynamics and Clinical Applications. Anesthesia & Analgesia.
  2. MarketsandMarkets. (2022). Inhalational Anesthetics Market Size & Trends.
  3. MacIntyre, N. et al. (2018). Environmental Impact of Inhalational Anesthetics. Anesthesiology.
  4. European Commission. (2021). Regulatory Framework for Medical Gases and Anesthetics.

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