Effects of Marijuana on Mental Health: Depression.

Authors: Susan A. Stoner
Alcohol & Drug Abuse Institute, University of Washington, June 2017
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THC and CBD appear to have antidepressant-like effects in animal models at certain doses but not others. Marijuana has been associated with diminished motivation, but a distinct “cannabis amotivational syndrome” has yet to be substantiated. Studies looking at whether marijuana…

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Cannabis use in adolescence and risk for adult psychosis: longitudinal prospective study.

Authors: Louise Arseneault, Mary Cannon, Richie Poulton, Robin Murray, Avshalom Caspi, Terrie E Moffitt
BMJ, 23 November 2002
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The strongest evidence that cannabis use may be a risk factor for later psychosis comes from a Swedish cohort study which found that heavy cannabis use at age 18 increased the risk of later schizophrenia sixfold. This study could not establish whether adolescent cannabis use w…

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