“There are several ways to explain the link between cannabis use and psychosis, and a causal relationship has not yet been firmly established. Current evidence supports that cannabis is a ‘component cause’ of chronic psychosis, meaning although neither necessary nor sufficient, cannabis use at a young age increases the likelihood of developing schizophrenia or other psychotic disorders. The overall magnitude of risk appears to be modest, and cannabis use is only 1 of myriad factors that increase the risk of psychosis. Furthermore, most cannabis users do not develop psychosis. However, the risk associated with cannabis occurs during a vulnerable time of development and is modifiable.”
Sep. 2011