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 associat...

In this study, neuroimaging of reward processing, drug cue reactivity and inhibitory control is used before and immediately after 8 weeks of two types of group therapy in individuals with opioid addiction; clinical outcomes will be assessed before, immediately and t...