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The endogenous cannabinoid system in Individuals with opioid use disorder and healthy: A brain imaging study

  • Study HIC#:2000033525
  • Last Updated:02/21/2025

The purpose of the study is to examine the endocannabinoid (eCB) function in individuals with Opioid Use Disorder (OUD) who take methadone or suboxone by measuring cannabinoid receptor 1 (CB1R) availability. Participation includes a screening visit, brain imaging sessions including MRI and PET scan, and two follow-up phone calls. Total estimated compensation is up to $550.

    Contact Us

    For more information about this study, including how to volunteer, contact:

    Angelina Contreras

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    You can help our team find trials you might be eligible for by creating a volunteer profile in MyChart. To get started, create a volunteer profile, or contact helpusdiscover@yale.edu, or call +18779788343 for more information.

    Eligibility Criteria

    • Key Inclusion Criteria
      • Men and women aged 18 years and older.
      • DSM-5 diagnosis of opioid use disorder (OUD group).
      • Physically healthy, i.e., with no clinically unstable medical conditions.
      • Have arterial access sufficient to allow blood sampling as per protocol.
    • Key Exclusion Criteria
      • Any current major medical disease that may be a risk factor for conducting PET scans, at the discretion of the PI.
      • Current or past diagnosis of major psychiatric disorders such as psychosis, bipolar disorder, and post-traumatic stress disorder, at the discretion of the PI.
      • Women with a positive pregnancy test or women who are lactating.
      • Claustrophobia.
      • History of a bleeding disorder or current use of anticoagulants.

    Principal Investigator

    Sub-Investigators

    • Rajiv Radhakrishnan

    For more information about this study, including how to volunteer, contact: