Comparing pain relief from methoxyflurane and morphine in heart attack patients

ANalgesic Efficacy and Safety of MOrphiNe Versus Methoxyflurane in Patients With Acute Myocardial Infarction

Phase 3 Interventional Collegium Medicum w Bydgoszczy · NCT04476173

This study is testing whether inhaled methoxyflurane can provide better pain relief than intravenous morphine for heart attack patients while avoiding some of morphine's side effects.

Quick facts

PhasePhase 3
Study typeInterventional
Enrollment200 (estimated)
Ages18 Years to 80 Years
SexAll
SponsorCollegium Medicum w Bydgoszczy Academic / other
Locations1 site (Bydgoszcz, Kujawsko-Pomorskie)
Trial IDNCT04476173 on ClinicalTrials.gov

What this trial studies

This study evaluates the effectiveness and safety of inhaled methoxyflurane compared to intravenous morphine for pain relief in patients experiencing acute myocardial infarction, specifically ST-elevation myocardial infarction (STEMI) and non-ST-elevation acute coronary syndrome (NSTE-ACS). The research aims to address the adverse effects of morphine, such as gastrointestinal issues, which can hinder the absorption of critical medications. By using methoxyflurane, which does not affect opioid receptors, the study seeks to provide effective pain management without compromising the efficacy of antiplatelet therapies. The trial is designed as a Phase 3 interventional study to gather robust data on these two analgesics.

Who should consider this trial

Good fit: Ideal candidates include adults aged 18 to 80 diagnosed with STEMI or NSTE-ACS.

Not a fit: Patients with pregnancy, severe heart failure, or uncontrolled hypertension may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide a safer and more effective pain management option for heart attack patients.

How similar studies have performed: Previous studies have indicated that methoxyflurane is effective for acute pain management, suggesting potential success for this approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* diagnosis of ST-elevation myocardial infarction (STEMI) or non-ST-elevation acute coronary syndrome (NSTE-ACS)
* patients aged from 18 to 80 years

Exclusion Criteria:

* pregnancy
* manifest infection or inflammatory state
* cardiogenic shock during screening for eligibility
* respiratory failure
* heart failure (NYHA class III or IV during screening for eligibility)
* uncontrolled hypertension (systolic blood pressure \>180 mmHg or diastolic blood pressure \>100 mmHg)

Where this trial is running

Bydgoszcz, Kujawsko-Pomorskie

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions ST Elevation Myocardial InfarctionNon ST Segment Elevation Acute Coronary Syndrome
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.