SynthesisEuropean archives of psychiatry and clinical neuroscience2020
Cannabis use and psychosis: a review of reviews.
Synthesis in European archives of psychiatry and clinical neuroscience, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 102 papers, 4 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
102 citing papers in PubMed, 4 syntheses or guidelines pooled it.
- Cannabis use among Arab students: a systematic review.Frontiers in psychiatry · 2025Pooled it
- Systematic review and meta-analysis on the effects of chronic peri-adolescent cannabinoid exposure on schizophrenia-like behaviour in rodents.Molecular psychiatry · 2025Pooled it
- Cannabinoids Drugs and Oral Health-From Recreational Side-Effects to Medicinal Purposes: A Systematic Review.International journal of molecular sciences · 2021Pooled it
- A systematic review of neuroimaging and acute cannabis exposure in age-of-risk for psychosis.Translational psychiatry · 2021Pooled it
- Randomized Laboratory Study of Single-Dose Cannabis, Dronabinol, and Placebo in Patients With Schizophrenia and Cannabis Use Disorder.Schizophrenia bulletin · 2025Trial
- [Effectiveness of a cannabis prevention program in school: results of a randomized prospective study].Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz · 2024Trial
- Cognitive Behavioral Therapy Program for Cannabis Use Cessation in First-Episode Psychosis Patients: A 1-Year Randomized Controlled Trial.International journal of environmental research and public health · 2022Trial
- Effects of cannabidiol in cannabis flower: Implications for harm reduction.Addiction biology · 2022Trial
- Emergency department use by individuals with and without psychosis after state-level cannabis legalization and commercialization.Nature. Mental health · 2026Article
- Behavioral and Functional Neuroimaging Effects of Delivering a Course of Repetitive Transcranial Magnetic Stimulation to Personalized Targets Within the Ventrolateral Or Dorsolateral Prefrontal Cortex in Treatment-Seeking Participants with Cannabis Use Disorder.medRxiv : the preprint server for health sciences · 2026Article
- Psychological and behavioral mechanisms linking childhood trauma profiles to voice-related distress in schizophrenia spectrum disorders: latent class, mediation, and conditional process analyses.Psychological medicine · 2026Article
- How does cognition change over time in young people who use cannabis recreationally? A narrative review of the longitudinal literature to date.Psychopharmacology · 2026Review
- Clusters of social and substance use-related risks are associated with the duration of untreated psychosis.Psychological medicine · 2026Article
- Long-Acting Naltrexone Restores Network Connectivity in Subjects With Comorbid Cannabis and Opioid Use Disorder.Addiction biology · 2026Article
- Suicide attempt and paranoia persisting for 28 days following heavy delta-9-tetrahydrocannabinolic acid and tetrahydrocannabinol use: A case report.PCN reports : psychiatry and clinical neurosciences · 2026Article
- Altered Neurobehavioral Reward Response Predicts Psychotic-Like Experiences in Youth Exposed to Cannabis Prenatally.Biological psychiatry · 2026Article
- Mental health consequences of contemporary cannabis use in Europe: potency, patterns of use, and health system context.Frontiers in psychiatry · 2026Review
- Burden of disease attributable to tobacco, high alcohol use, and drug use from 1990 to 2021.Frontiers in nutrition · 2026Article
- Same dose, different impact: acute cannabis intoxication impairs visuospatial working memory in both sexes, with disproportionate male vulnerability.Frontiers in behavioral neuroscience · 2026Article
- Cannabis and tobacco co-use predicts psychosis in clinical high risk cohorts.Nature. Mental health · 2026Article
42 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We conducted a systematic review of meta-analyses and systematic reviews to evaluate the impact of cannabis use on the onset and course of psychoses. Following a systematic literature search of five data bases (2005-2016) and consecutive structured evaluation, we were able to include 26 systematic reviews and meta-analyses. The methodological quality of the included publications were in the range of high and poor. The scientific literature indicates that psychotic illness arises more frequently in cannabis users compared to non-users, cannabis use is associated with a dose-dependent risk of developing psychotic illness, and cannabis users have an earlier onset of psychotic illness compared to non-users. Cannabis use was also associated with increased relapse rates, more hospitalizations and pronounced positive symptoms in psychotic patients. We make recommendations about the type of research that is required to better characterize the relationship between cannabis use and the development and outcomes of psychosis.
Indexed as
Identifiers
31563981What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.