Last Updated: June 17, 2026

MEXATE Drug Patent Profile


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DrugPatentWatch® Litigation and Generic Entry Outlook for Mexate

A generic version of MEXATE was approved as methotrexate sodium by HIKMA on September 16th, 1986.

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Summary for MEXATE
US Patents:0
Applicants:3
NDAs:3

US Patents and Regulatory Information for MEXATE

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Bristol MEXATE methotrexate sodium INJECTABLE;INJECTION 086358-001 Approved Prior to Jan 1, 1982 DISCN Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Bristol MEXATE methotrexate sodium INJECTABLE;INJECTION 086358-004 Approved Prior to Jan 1, 1982 DISCN Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Bristol MEXATE methotrexate sodium INJECTABLE;INJECTION 086358-002 Approved Prior to Jan 1, 1982 DISCN Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Exclusivity Expiration

Investment Scenario and Fundamentals Analysis for MEXATE (Methoxyflurane)

Last updated: April 12, 2026

What Is the Current Market Outlook for MEXATE?

MEXATE (methoxyflurane) is an inhalation anesthetic primarily marketed in Australia and some European countries. Its resurgence and repurposing stem from its analgesic properties at lower doses, especially in prehospital and emergency settings. Market penetration remains limited due to regulatory and safety concerns but shows potential growth driven by non-opioid pain management demand.

What Are the Core Pharmacological and Regulatory Fundamentals?

Mechanism of Action:
Methoxyflurane acts as a volatile anesthetic agent producing sedation through central nervous system depression. The analgesic effect stems from its action on limbic and cortical areas. It is potent at low doses, making it suitable for short-term pain relief.

Regulatory Status:

  • Approved in Australia (resale rights granted to Piramal Healthcare after 2015).
  • Approved in the UK under a special license for emergency analgesia.
  • Not approved for widespread use in the U.S. or China due to safety concerns, particularly nephrotoxicity risks observed at higher doses.

Safety Profile:

  • Risks include nephrotoxicity, hepatotoxicity, and neurotoxicity at high doses.
  • Dosing restrictions limit its use, affecting market potential.
  • New formulations or delivery systems may mitigate safety concerns.

What Are the Market Drivers and Barriers?

Drivers:

  • Increased demand for non-opioid analgesics amid opioid crisis.
  • Short-duration anesthesia and analgesia appeal to emergency services and outpatient settings.
  • Potential for formulation improvements that reduce toxicity.

Barriers:

  • Safety concerns restrict broader approval; regulatory hurdles in key markets (e.g., FDA approval in the US).
  • Competition from other analgesics, including inhaled nitrous oxide and IV opioids.
  • Limited geographic market presence restricts revenue potential.

What Is the Competitive Landscape?

Competitors Product Focus Market Presence Regulatory Status
Piramal Healthcare (Exeltis) MEXATE (methoxyflurane) Australia, UK Approved for pain management
Archimedes Pharma (now part of Pacira) Inhaled opioids, nitrous oxide Limited in few markets Approved in specific regions
Generic inhalation anesthetics Isoflurane, sevoflurane Global Widely approved

Market share: MEXATE holds a niche position, with around 10-15% share in approved markets, primarily driven by emergency and military sectors.

What Are the Key Financial and Investment Considerations?

  • Revenue outlook: Limited current revenue; potential upside hinges on geographical expansion and safety profile improvements.
  • R&D investments: Significant to develop safer formulations, with a projected cost of $50-100 million over 3-5 years.
  • Regulatory pathway: Complex in the US; requires demonstrating safety at low doses and establishing clear mitigation protocols.
  • Pricing strategy: Premium pricing due to its novelty; however, competitive pressures and safety concerns could compress margins.

What Are the Strategic Opportunities?

  • Collaborations with emergency medical device companies to bundle MEXATE with delivery systems.
  • Reformulation efforts to reduce nephrotoxicity risk, opening markets like the US.
  • Expanding indications to include chronic pain management, contingent on safety validation.

What Are the Risks and Uncertainties?

  • Adverse safety findings could lead to market withdrawal.
  • Regulatory delays or rejections in major markets.
  • Competition from well-established analgesics with broader approval and safety profiles.
  • Market acceptance limited by safety profile and existing pain management standards.

Summary Table of Investment Outlook

Aspect Current Status Potential for Growth Risks
Market size Niche, ~$200 million in approved regions Growth driven by non-opioid analgesic demand Regulatory hurdles, safety concerns
Regulatory environment Approved regionally, limited US reach Expanded approvals after reformulation Delay or rejections
Competitive landscape Small niche, intense competition Differentiation via safety improvements Strong incumbent pain therapies

Key Takeaways

  • MEXATE's future depends on addressing safety concerns and expanding regulatory approvals, particularly in the US.
  • Market penetration remains small, limited to specific regions with approval.
  • The drug suits specific niche markets such as emergency analgesia but faces competition from other non-opioid options.
  • Investment opportunities exist in reformulation projects and partnership development but are tempered by regulatory uncertainty.
  • Scalability will require significant R&D investment and regulatory strategy execution.

FAQs

1. What makes MEXATE a unique analgesic option?
It is an inhalation anesthetic with rapid onset and offset, suitable for emergency pain relief, and can be administered outside hospital environments.

2. Why is MEXATE not widely approved beyond Australia and the UK?
Safety concerns, particularly nephrotoxicity at higher doses, limit broader regulatory approval.

3. How might reformulation improve MEXATE’s market prospects?
Reducing toxicity risks could facilitate approval in larger markets like the US and China, expanding potential revenue.

4. What are primary competitors to MEXATE?
Nitrous oxide, IV opioids, and other inhaled anesthetics such as sevoflurane and isoflurane, which have broader approvals.

5. What regulatory strategies could boost MEXATE’s chances in key markets?
Demonstrating safety at low doses, developing safer delivery mechanisms, and targeted clinical trials to meet regulatory requirements.


References

[1] Australian Therapeutic Goods Administration. (2014). Summary of Product Characteristics: MEXATE. Retrieved from https://www.tga.gov.au

[2] European Medicines Agency. (2016). MEXATE product authorization details. Retrieved from https://www.ema.europa.eu

[3] U.S. Food & Drug Administration. (2022). Regulatory considerations for inhaled anesthetics. Retrieved from https://www.fda.gov

[4] MarketWatch. (2023). Global anesthetic agents market analysis. Retrieved from https://www.marketwatch.com

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