Investigating the Neural Correlates of Cognitive Function in Psychosis Patients and Non-Psychiatric Controls With Cannabis Use
Recruiting now · Not applicable
Conditions studied: Psychotic Disorders, Cannabis Use Disorder, Cannabis Dependence, Cannabis Use, Schizophrenia; Psychosis, Cognitive Dysfunction, Memory Impairment, Neuroimaging
In brief
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.
Key facts
- Study ID
- NCT05445180
- Run by
- Douglas Mental Health University Institute
- People needed
- 134
- Starts
- 2022-04-21
- Expected to finish
- 2027-05-01
- Last updated by the study team
- 2026-05-22
Who can join
Age: 16 and older, up to 80. Sex: any. Healthy volunteers: accepted.
You may qualify if…
- 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)
You may not qualify if…
- 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
Where it is running
- Douglas Mental Health University Institute — Montreal, Quebec, Canada (enrolling)
Full record on ClinicalTrials.gov
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