The Lancet Psychiatry
July 1, 2026
W. Hall, T. Yimer, R. Thorne et al.
Cannabis use often begins in adolescence and young adulthood, when anxiety, depression, psychosis, and bipolar disorder typically first develop. Young people aged in their mid-teens to mid-twenties who engage in daily cannabis use and develop a cannabis use disorder have a higher prevalence of these mental disorders. We assessed the coherence of evidence from epidemiological, genetic,...
Journal of dual diagnosis
July 3, 2023
Benedikt Fischer, W. Hall, T. Fidalgo et al.
Abstract Objective: Cannabis use is increasingly normalized; psychosis is a major adverse health outcome. We reviewed evidence on cannabis use-related risk factors for psychosis outcomes at different stages toward recommendations for risk reduction by individuals involved in cannabis use. Methods: We searched primary databases for pertinent literature/data 2016 onward, principally relying on...
AJOB Neuroscience
April 3, 2023
A. Carter, Myfanwy Graham, W. Hall et al.
informed consent to psychedelic-assisted psychotherapy. Johnson, M. W. 2021. Consciousness, religion, and gurus: Pitfalls of psychedelic medicine. ACS Pharmacology & Translational Science 4 (2):578–81. doi:10.1021/acsptsci. 0c00198. Herzberg, G., K. Conour, J. Butler, A. Emerson, L. S. Gillooly, V. Gold, M. Hayes, L. Mix, and E. Sienknecht. 2019. Towards an ethos of equity and inclusion in the...
JAMA Psychiatry
April 8, 2020
R. Murray, W. Hall
There is a worldwide trend toward liberalizing cannabis policy and commercializing its sale. Uruguay legalized recreational cannabis in 2013, as did Canada in 2018, as well as 10 US states.1 Other countries have decriminalized the drug. In Holland, cannabis can be bought in designated cafes, and in Portugal, the police refer those who regularly use cannabis for counseling. Psychiatrists have...
European Neuropsychopharmacology
April 5, 2020
Valentina Lorenzetti, Eva Hoch, W. Hall
We review the findings of systematic reviews and meta-analyses of case-control studies that examine brain functioning and cognitive correlates of adolescent cannabis use using structural and functional neuroimaging tools and standardised neuropsychological tests. We also examine prospective epidemiological studies on the possible effects of adolescent and young adult cannabis use on cognitive...
The Lancet Psychiatry
October 28, 2019
N. Black, E. Stockings, G. Campbell et al.
Background: Medicinal cannabinoids, including medicinal cannabis, pharmaceutical cannabinoids and their synthetic derivatives, including tetrahydrocannabinol (THC) and or cannabidiol (CBD), have been suggested to have a therapeutic role for certain mental health conditions. The primary objective was to review the evidence for cannabinoids in treating symptoms of depression, anxiety,...
The International journal on drug policy
2010
Jennifer McLaren, Edmund Silins, D. Hutchinson et al.
Over the past five years, the release of cohort studies assessing the link between cannabis and psychosis has increased attention on this relationship. Existing reviews generally conclude that these cohort studies show cannabis has a causal relationship to psychosis, or at least that one cannot be excluded. Few studies have evaluated the relative strengths and limitations of these...