ArticleFrontiers in psychiatry2023
Effects of cannabis regulation in Switzerland: Study protocol of a randomized controlled trial.
Article in Frontiers in psychiatry, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05522205 (WEED CARE - Randomized Controlled Study on Regulated Cannabis Access for Recreational Use in Pharmacies in Basel), which is not on this map. Cited by 7 papers.
What it found
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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.
WEED CARE - Randomized Controlled Study on Regulated Cannabis Access for Recreational Use in Pharmacies in Basel
Who cites it
7 citing papers in PubMed, 11 citations in OpenAlex.
- Effects of legal access versus illegal market cannabis on use and mental health: A randomized controlled trial.Addiction (Abingdon, England) · 2025Trial
- NfL and GFAP quantification and associations with mental health in recreational cannabis users-Results from the Swiss study on recreational cannabis access via pharmacies.Molecular neurobiology · 2026Article
- Mental health consequences of contemporary cannabis use in Europe: potency, patterns of use, and health system context.Frontiers in psychiatry · 2026Review
- Cannabinoids in Chronic Pain: Clinical Outcomes, Adverse Effects and Legal Challenges.Neurology international · 2025Review
- Article
- Cannabinoids for treating psychiatric disorders in youth: a systematic review of randomized controlled trials.Child and adolescent psychiatry and mental health · 2024Review
- Cannabis use and its association with psychopathological symptoms in a Swiss adult population: a cross-sectional analysis.Frontiers in public health · 2024Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: Cannabis is the most widely used illicit substance. Various countries have legalized cannabis for recreational use. Evidence on the health effects of cannabis regulation remains unclear and is mainly based on observational studies. To date, there is no randomized controlled study evaluating the impact of cannabis regulation for recreational use compared to the illicit market on relevant health indicators. The present study ("Weed Care") is the first to evaluate the impact of regulated cannabis access in pharmacies versus a waiting list control group representing the illicit market on problematic cannabis use as well as on mental and physical health. Methods: The study is divided into two parts-a randomized controlled study of 6 months followed by an observational study of 2 years. Participants ( Discussion: Findings from this study may provide a scientific basis for future discussions about addiction medicine and cannabis policy in Switzerland. Clinical Trial Registration: ClinicalTrials.gov (NCT05522205). https://clinicaltrials.gov/ct2/show/NCT05522205.
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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.