Substance-Related Disorders Clinical Trial
Official title:
Neuroimaging and CBD for Opiod Use Disorder
The investigators propose an imaging study to investigate the neurobiological effects of CBD (vs placebo) in participants with opioid use disorder who are maintained on methadone. The purpose of the study is to determine the neural circuits and transmitters associated with the effects of CBD on to reduce craving and anxiety. The neuroimaging will be conducted in participants immediately following their first administration of CBD (800mg or placebo) and one week after the last administration (3 daily doses). This CBD administration protocol was shown in previous studies by the investigators to reduce craving and anxiety in abstinent heroin users.
This study will first use multimodal imaging in individuals with opiod use disorder who are maintained on methadone to determine the neural circuits associated with the effects of CBD on craving and anxiety. Secondly, the investigators will conduct 1H MRS to characterize in-vivo neurochemical levels associated with CBD administration. Altogether, the data obtained will fill critical gaps of knowledge important in the development of a potential non-opioid medication for treating opioid use disorder. CBD has been shown to be safe in association with opioid use and not to have severe side effects. The oral CBD solution (Epidiolex) to be used in the current study is approved by the FDA for the treatment of seizures associated with two rare and severe forms of epilepsy, Lennox-Gastaut syndrome and Dravet syndrome, in patients 2 years of age and older. Our study will investigate the neurobiological effects of CBD which is critical for its development as a potential treatment for opioid use disorder in the future. Study participation duration will last 2 weeks and will include multimodal imaging techniques to examine neural connectivity, neural activity and glutamate (and other neurometabolites) levels in relation to the impact on cue-induced responses in OUD subjects. The imagining sessions will include CBD/placebo administration; Magnetic Resonance Imaging (MRI) during task and resting-state functional MRI (rs-fMRI) and Magnetic Resonance spectroscopy (MRS); and questionnaires measuring craving, anxiety, depression, elements of cognitive function, and psychiatric history. Screening: Study candidates will be recruited through flyers, ads and referrals from AIMS clinics. At the initial phone contact candidates will be screened for exclusion criteria and provided study information and, if they remain interested and no exclusion criteria are encountered, invited for in-person screening. Candidates will then undergo the informed consent procedure, be fully screened for eligibility and complete baseline assessments. Randomization: Participants will be randomly assigned to either CBD or Placebo condition. ;
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