Analgesic Response to Opioid Analgesics in Buprenorphine-Maintained Individuals

May 9, 2014 updated by: Walter Ling, University of California, Los Angeles
The aim of this study is to examine the effects of opioid analgesics on acute pain in participants maintained on buprenorphine+naloxone (Suboxone) for opioid use disorders. Seven medication conditions will be tested in a cold pressor test (CPT) paradigm.

Study Overview

Status

Status

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

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.

Detailed Description

Study design is a single-blind examination of the analgesic effects of a single dose of seven test medications provided in an experimental pain paradigm using a cold pressor test (CPT). Test medication conditions include buprenorphine, morphine, hydromorphone, hydrocodone, oxycodone, and two placebo conditions to match test medication formulations (oral tablet, sublingual tablet). Each medication condition will be tested on separate days (seven total days, completing within 12 weeks), with random assignment to order of study medications. After screening, eligible participants will be scheduled for 7 days of testing with test days at least 3 days apart to provide a sufficient medication wash-out period. Pain testing will utilize cold pressor tests (CPT), in which the participant submerges his arm and hand in a bath of ice cold water to determine pain threshold and tolerance. Participants will be given a practice trial to provide familiarity with the test and reduce test anxiety. Two CPTs will occur on each test day, and pre- and post-CPT assessments will be administered. Blood samples will be taken on each test day to measure blood levels of buprenorphine. Daily procedures include: (1) A baseline CPT (BL-CPT), (2) Administration of the test medication (active drug or placebo), (3) CPT administered at the time of maximum drug effect (Tmax-CPT) specific to medication (range 30-120 minutes), (4) Pupillometry conducted at baseline (before BL-CPT), and at time of maximum drug effect (before Tmax-CPT). Each participant will be discharged after clinical determination of the participant's safety and well-being. Testing will continue until twelve trials of each medication condition are completed.

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 (Anticipated)

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.
12

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.
  • Not Applicable

Contacts and Locations

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

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

  • United States
    • California
      • Los Angeles, California, United States, 90025
        • Recruiting
        • UCLA Integrated Substance Abuse Programs Outpatient Clinical Research Center
        • Contact:
        • Contact:
        • Principal Investigator:
          • Walter Ling, MD

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

20 years to 50 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Male

Description

Inclusion Criteria:

  1. Male, in good general health
  2. 20-50 years old
  3. Fluent in English
  4. Maintained on buprenorphine for at least 3 months
  5. Able to complete testing/assessments for 7 test days within 12 weeks
  6. Approved for participation by buprenorphine-prescribing physician

Exclusion Criteria:

  1. Known hypersensitivity to any of the test opioids
  2. Urine test positive for opioids (other than buprenorphine) or other illicit substances
  3. Current use of any additional opioid or analgesic medication (other than buprenorphine), medical marijuana, MAOI, tricyclic antidepressant, duloxetine, gabapentin, pregabalin, or other medication considered unsafe or having potential to influence pain perception as determined by study physician.
  4. Presence of acute pain condition or planned surgery during the study period
  5. Unstable vital signs as determined by the study physician.
  6. Current pattern of alcohol, benzodiazepine, or other sedative hypnotic use, as determined by the study medical clinician, which would preclude safe participation in the study;
  7. Pending legal action or other situation that might prevent remaining in the area for the duration of the study
  8. Current medical or psychiatric condition that could detract from study objectives, place the participant at risk, or interfere with treatment goals

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

  • Allocation: Randomized
  • Interventional Model: Single Group Assignment
  • Masking: Single

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.
Experimental: morphine sulfate
30mg, single dose,
Drug: oral tablet placebo
Participants will receive randomly assigned order of study drug (opioid) and then have 7 days of testing with test days at least 3 days apart. Pain testing will utilize cold pressor test, in which the participant submerges his arm and hand in a bath of ice cold water to determine pain threshold and tolerance.
Other Names:
  • single dose
Experimental: hydrocodone
10mg single dose
Drug: oral tablet placebo
Participants will receive randomly assigned order of study drug (opioid) and then have 7 days of testing with test days at least 3 days apart. Pain testing will utilize cold pressor test, in which the participant submerges his arm and hand in a bath of ice cold water to determine pain threshold and tolerance.
Other Names:
  • single dose
Experimental: hydromorphone HCI
4mg single dose
Drug: oral tablet placebo
Participants will receive randomly assigned order of study drug (opioid) and then have 7 days of testing with test days at least 3 days apart. Pain testing will utilize cold pressor test, in which the participant submerges his arm and hand in a bath of ice cold water to determine pain threshold and tolerance.
Other Names:
  • single dose
Experimental: oxycodone
10 mg single dose
Drug: oral tablet placebo
Participants will receive randomly assigned order of study drug (opioid) and then have 7 days of testing with test days at least 3 days apart. Pain testing will utilize cold pressor test, in which the participant submerges his arm and hand in a bath of ice cold water to determine pain threshold and tolerance.
Other Names:
  • single dose
Experimental: buprenorphine
4 mg single dose
Drug: sublingual tablet placebo
Participants will receive randomly assigned order of study drug (opioid) and then have 7 days of testing with test days at least 3 days apart. Pain testing will utilize cold pressor test, in which the participant submerges his arm and hand in a bath of ice cold water to determine pain threshold and tolerance.
Other Names:
  • single dose
Placebo Comparator: oral tablet placebo
single dose
Drug: morphine sulfate
Participants will receive randomly assigned order of study drug (opioid) and then have 7 days of testing with test days at least 3 days apart. Pain testing will utilize cold pressor test, in which the participant submerges his arm and hand in a bath of ice cold water to determine pain threshold and tolerance.
Other Names:
  • 30 mg, single dose
Drug: hydrocodone
Participants will receive randomly assigned order of study drug (opioid) and then have 7 days of testing with test days at least 3 days apart. Pain testing will utilize cold pressor test, in which the participant submerges his arm and hand in a bath of ice cold water to determine pain threshold and tolerance.
Other Names:
  • 10mg single dose
Drug: hydromorphone HCI
Participants will receive randomly assigned order of study drug (opioid) and then have 7 days of testing with test days at least 3 days apart. Pain testing will utilize cold pressor test, in which the participant submerges his arm and hand in a bath of ice cold water to determine pain threshold and tolerance.
Other Names:
  • 4 mg single dose
Drug: oxycodone
Participants will receive randomly assigned order of study drug (opioid) and then have 7 days of testing with test days at least 3 days apart. Pain testing will utilize cold pressor test, in which the participant submerges his arm and hand in a bath of ice cold water to determine pain threshold and tolerance.
Other Names:
  • 10 mg single dose
Placebo Comparator: sublingual tablet placebo
single dose
Drug: buprenorphine
Participants will receive randomly assigned order of study drug (opioid) and then have 7 days of testing with test days at least 3 days apart. Pain testing will utilize cold pressor test, in which the participant submerges his arm and hand in a bath of ice cold water to determine pain threshold and tolerance.
Other Names:
  • 4 mg single dose

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
Pain detection
Time Frame: 7 testing sessions over 12 weeks
Pain detection is defined as the number of seconds it takes for the participant to feel pain.
7 testing sessions over 12 weeks
Pain tolerance
Time Frame: 7 testing sessions over 12 weeks
Pain tolerance is defined as the number of seconds it takes before the participant removes his hand from the ice water.
7 testing sessions over 12 weeks

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
Pupillometry results
Time Frame: 7 testing sessions over 12 weeks
Examine pupillometry results in the context of administered opioid medications and associated cold pressor tests.
7 testing sessions over 12 weeks

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.
University of California, Los Angeles

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Indivior Inc.

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: Walter Ling, MD, University of California, Los Angeles

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

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.
April 1, 2014

Primary Completion (Anticipated)

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.
December 1, 2014

Study Completion (Anticipated)

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.
December 1, 2014

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).
March 18, 2014

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.
May 9, 2014

First Posted (Estimate)

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.
May 13, 2014

Study Record Updates

Last Update Posted (Estimate)

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.
May 13, 2014

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.
May 9, 2014

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.
May 1, 2014

More Information

Terms related to this study

Keywords

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.
  • 13-001175

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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