Efficacy and Safety of Methoxyflurane (Penthrox) for the Treatment of Acute Pain in Minor Trauma | Completed
Efficacy and Safety of Methoxyflurane (Penthrox) for the Treatment of Acute Pain in Minor Trauma
Trial Source

There is no location for this trial

Location data is sourced from multiple external providers and UKCTG is not responsible for and cannot guarantee the accuracy of data.

Health Conditions
  • Acute Pain Due to Trauma
Unfortunately contact details are not available for this trial.
Primary Contact Details
Recruitment Status
Primary Trial ID Number
This study investigates the treatment of acute pain, an unpleasant feeling caused by an injury. The overall purpose of the study is to gain more information that the pain relief medicine Penthrox(Methoxyflurane) administered using the Penthrox Inhaler(a distinctive green, whistle like object that you breathe through) is safe and works at relieving pain in patients aged 12 years and older who are admitted to a hospital Emergency Department with a minor injury (known as trauma).
Research Details
    Sorry, this information is not available
Phase 3
Study Design
Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator, Outcomes Assessor), Primary Purpose: Treatment
Study Type
Drug : Methoxyflurane

Study Arm Groups : Methoxyflurane, Normal Saline

Intervention Type
See Interventions above
Primary Outcome Measures
  • VAS Score; Twenty Minutes
Secondary Outcome Measures
  • Rescue Medication; Up to a maximum of 6 hours; Time to pain relief; Up to a maximum of 6 hours; Responder analysis; Up to a maximum of 6 hours; Safety Analysis; Up to 16 days
Sorry, this information is not available
Result Reports
This is available on the Clinicaltrials.gov website
Age Range
12 Years - N/A
Who Can Participate
Number of Participants
Sorry, this information is not available
Participant Inclusion Criteria
  • Inclusion Criteria:
  • - Patients 12 years of age or older who are able to give written informed consent or
  • who are accompanied by a parent(s)/legal guardian able to provide written informed
  • consent on their behalf.
  • - Evidence of signed and dated informed consent document(s) indicating that the patient
  • (and/or a parent/legal guardian) has been informed of all pertinent aspects of the
  • study.
  • - Pain Score ≥ 4 to ≤ 7 as measured using Numerical Rating Scale (NRS) at the time of
  • admission, due to minor trauma.
  • Exclusion Criteria:
  • - Life-threatening condition requiring immediate admission in the Operating Room or
  • Intensive Care Unit.
  • - Presence of any other clinical condition(s) that may, in the opinion of the
  • investigator, impact on the patient's ability to participate in the study, or on the
  • study results, including history of head injury and/or altered consciousness.
  • - Unable to provide written informed consent.
  • - Known pregnancy or lactation
  • - Acute intoxication with drugs or alcohol, based on the judgement of the attending
  • physician.
  • - Treatment with any analgesic agent within 5 hours prior to presentation to ED (except
  • diclofenac sodium which is prohibited within 8 hours prior to presentation to ED).
  • - Current ongoing use of analgesics for chronic pain.
  • - Use of an investigational product within one month prior to presentation to ED.
  • - Known personal or familial hypersensitivity to fluorinated anaesthetics.
  • - Known personal or familial history of malignant hyperthermia.
  • - Clinically significant respiratory depression.
  • - Use of methoxyflurane in the previous 4 weeks.
  • - Known pre-existing clinically significant renal or hepatic impairment according to
  • the judgement of the clinician.
  • - Clinically significant cardiovascular instability.
Participant Exclusion Criteria
This is in the inclusion criteria above
Trial Location(s)
Nottingham University Hospitals NHS Trust
West Midlands
B4 6NH
South Tees NHS Trust
Barnsley District General Hospital
S75 2EP
Royal Victoria Infirmary
Trial Contact(s)
Primary Trial Contact
Sorry, this information is not available
Other Trial Contacts
Sorry, this information is not available
Countries Recruiting
United Kingdom
Scientific Title
A Randomised, Double Blind, Multi-centre, Placebo Controlled Study to Evaluate the Efficacy and Safety of Methoxyflurane (Penthrox) for the Treatment of Acute Pain in Patients Presenting to an Emergency Department With Minor Trauma
EudraCT Number
Not available for this trial
  • ORION Clinical Services
Other Study ID Numbers
Medical Developments International Limited
Key Dates

Recruitment Start Date

Aug 2011

Recruitment End Date

Jul 2012

Trial Start Date
Date Not Available
Trial End Date
Date Not Available
Date Assigned

11 Aug 2011

Last Updated

30 Oct 2012