RecruitingNot Applicable

Investigating the Neural Correlates of Cognitive Function in Psychosis Patients and Non-Psychiatric Controls With Cannabis Use

Canada134 participantsStarted 2022-04-21

Plain-language summary

Cognitive impairment is well established in people with psychosis and is associated with cannabis use. The current study will investigate the neurobiological basis of cognitive change associated with 28-days of cannabis abstinence in people with psychosis and non-psychiatric controls with cannabis use. Participants will be randomized to a cannabis abstinent group or a non-abstinent control group and will undergo magnetic resonance imaging at baseline and following 28-days of abstinence. This study will help characterize the neuropathophysiological processes underlying cognitive dysfunction associated with cannabis use and its recovery which may guide the development of novel interventions for problematic cannabis use.

Who can participate

Age range16 Years – 80 Years

SexALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * Able to provide informed consent in English or French * Heavy cannabis use (defined as weekly cannabis use for at six months) and/or DSM-5 diagnosis of CUD * Have a Full-Scale IQ ≥ 75 * Meet DSM-5 criteria for a psychotic disorder (psychosis patient arm only) * Be an outpatient receiving a stable dose of medication(s) for at least two months (psychosis patient arm only) * Clinically stable (as measured by the PANSS-6, total score \<30) (psychosis patient arm only) Exclusion Criteria: * current SUD (other than CUD) * MRI contraindications * Positive urine screen for psychoactive substances other than cannabis, nicotine, or caffeine * Current suicidal or homicidal ideation * Head injury requiring hospitalization or loss of consciousness \> 5 minutes * Current medical diseases that requires hospitalization or regular monitoring * Being pregnant * DSM-5 Axis 1 diagnosis (other than CUD) (non-psychiatric controls only) * Taking psychotropic medication

What they're measuring

Change in fMRI brain activity pattern

Timeframe: Baseline, Day 28

Change in behavior during fMRI task

Timeframe: Baseline, Day 28

Trial details

NCT IDNCT05445180

SponsorDouglas Mental Health University Institute

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2027-05

Contact for this trial

Charlene Osei-Afrifa

(514) 761-6131 aimh.research@gmail.com