Oral Methadone in Cardiac Surgery (OMICS)

October 27, 2026 updated by: Krishnan Ramanujan, Mayo Clinic

Oral Methadone In Cardiac Surgery

The purpose of this study is to compare the effects of administration of oral methadone preoperatively and intravenous methadone upon induction of general anesthesia on postoperative pain for patients undergoing elective cardiac surgery.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
100

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Minnesota
      • Rochester, Minnesota, United States, 55905
        • Mayo Clinic in Rochester

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

• Undergoing elective cardiac surgery

Exclusion Criteria:

  • Chronic pain requiring opioid medications as an outpatient
  • Opioid use disorder on medication assistance treatment
  • Prolonged QTc >500ms
  • Chronic kidney disease with eGFR < 30mL/min
  • Documented cirrhosis
  • Intolerance to methadone
  • Admitted inpatient in an intensive care unit (ICU) immediately prior to surgery
  • Pregnancy at the time of surgery
  • Subsequent surgeries after index surgery

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Active Comparator: Intravenous methadone intraoperatively

Subjects in the IV methadone arm will receive methadone intravenously during cardiac surgery
Drug: Methadone, intravenously

Patients will receive 0.3mg/kg methadone intravenously after induction of general anesthesia
Experimental: Oral methadone, immediately prior to transport

Subjects in the oral methadone arm will receive methadone orally prior to cardiac surgery
Drug: Methadone, oral

Patients will receive 0.4mg/kg PO methadone immediately prior to transport to the operating room

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Amount of opioid medication used 72 hours post-extubation
Time Frame: From hospital admission for surgery to 72 hours after the patient is extubated postoperatively

Opioid medication used at 72 hours post-extubation will be reported in morphine milligram equivalents
From hospital admission for surgery to 72 hours after the patient is extubated postoperatively

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Amount of opioid medication used 24 hours post-extubation
Time Frame: From hospital admission for surgery to 24 hours after the patient is extubated postoperatively

Opioid medication used at 24 hours post-extubation will be reported in morphine milligram equivalents
From hospital admission for surgery to 24 hours after the patient is extubated postoperatively
Amount of opioid medication used 48 hours post-extubation
Time Frame: From hospital admission for surgery to 48 hours after the patient is extubated postoperatively

Opioid medication used at 48 hours post-extubation will be reported in morphine milligram equivalents
From hospital admission for surgery to 48 hours after the patient is extubated postoperatively
Amount of opioid medication required throughout hospitalization
Time Frame: From the time the patient is extubated until the time the patient leaves the hospital, approximately 10 days. Safety to leave the hospital is determined by the cardiac surgery team and can be several days after surgery or longer.

Opioid medication required from extubation until hospital discharge will be reported in morphine milligram equivalents
From the time the patient is extubated until the time the patient leaves the hospital, approximately 10 days. Safety to leave the hospital is determined by the cardiac surgery team and can be several days after surgery or longer.
Amount of opioid medication required prior to extubation
Time Frame: From arrival in the ICU until extubation, approximately 6 hours. Safety of extubation is determined by the intensive care unit team and usually occurs within several hours of ICU arrival, although this can be variable.

Opioid medication required between the end of surgery and extubation will be documented in morphine milligram equivalents.
From arrival in the ICU until extubation, approximately 6 hours. Safety of extubation is determined by the intensive care unit team and usually occurs within several hours of ICU arrival, although this can be variable.
Pain scores after extubation
Time Frame: 6 hours, 12 hours, 24 hours, 48 hours, and 72 hours after extubation

Pain will be assessed by nursing staff using a numerical rating scale from 0-10, with 0 being no pain and 10 being the worst pain imaginable.
6 hours, 12 hours, 24 hours, 48 hours, and 72 hours after extubation
Time to extubation
Time Frame: From the time the patient arrives in the ICU intubated until the time they are successfully extubated, approximately 12 hours. Safety of extubation is determined by the ICU team and usually occurs within several hours, although this can be variable.

This outcome will monitor the time in minutes from when a patient arrives in the ICU to the time the breathing tube is removed (extubation).
From the time the patient arrives in the ICU intubated until the time they are successfully extubated, approximately 12 hours. Safety of extubation is determined by the ICU team and usually occurs within several hours, although this can be variable.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Mayo Clinic

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Krishnan Ramanujan, M.D., Mayo Clinic

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 13, 2026

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
August 22, 2026

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
October 25, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
October 25, 2025

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 25, 2025

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
October 28, 2025

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
October 28, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 27, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
October 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 25-007292

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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