Key Findings: Findings support a correlation between early cannabis use and an increased risk of psychosis, observing a dose-related effect where the risk escalates with higher usage. Particularly vulnerable groups include adolescents, individuals with prior psychotic symptoms, and those with a high genetic risk for schizophrenia.
Type of Study: Clinical Meta-analysis
Study Result: Negative
Research Location(s): United Kingdom
Year of Pub: 2005
Cannabinoids Studied: Cannabinoid (unspecified)
Phytocannabinoid Source: Not Applicable
Chemotype: , Chemotype I
Citation: Semple DM, et al. Cannabis as a risk factor for psychosis: systematic review. J Psychopharmacol. 2005; 19:187-94. doi: 10.1177/0269881105049040
Authors: Semple DM, McIntosh AM, Lawrie SM