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The Reincarnation of Methoxyflurane
1Department of Anesthesiology and Critical Care, St. Louis University School of Medicine, St. Louis, MO 63141.
Methoxyflurane, once an anesthetic, is now a safe inhaled analgesic for rapid pain relief. Used globally with a Penthrox inhaler, it offers conscious sedation for prehospital and minor surgical settings.
Area of Science:
- Anesthesiology
- Pharmacology
Background:
- Methoxyflurane was a 1960s general anesthetic agent.
- Its use declined due to dose-dependent nephrotoxicity.
- Distribution ceased in the US and Canada in 1999.
Observation:
- Methoxyflurane has been repurposed as an inhaled analgesic outside North America.
- It is administered at low concentrations via a hand-held Penthrox inhaler.
- This system allows patients conscious sedation and self-administration for pain management.
Findings:
- The Penthrox inhaler is used in over 37 countries.
- Methoxyflurane provides rapid and potent pain relief.
- Cautious administration ensures safety with minimal side effects.
Implications:
- Methoxyflurane offers a safe and effective option for acute pain management.
- Its self-administration feature enhances patient control and comfort.
- The Penthrox inhaler represents a portable and disposable delivery system for potent analgesia.
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