The 15 milliliter supply of methoxyflurane would typically last for two to three hours, during which time the user would often be partly amnesic to the sense of pain; the device could be refilled if necessary.
The Penthrox inhaler, manufactured and marketed by Medical Developments International (Melbourne, Victoria, Australia), is a hand-held inhaler device which can be used for the self-administration of methoxyflurane for analgesia (relief of pain).