Cannabis use has been reported to induce long-lasting psychotic disorders and a dose-response relationship has been observed. We performed a systematic review of studies that investigate the association between the degree of cannabis consumption and ...
This has been known for awhile but it does not really depend on amount used but rather the users genetics. If that user is genetically susceptable then they will have more risk with increased use.
Cannabis users also self medicated for psychological issues. but in Canada, post legalization Schizophrenia is on the increase and higher than comparable countries. The prevalence has doubled since 2002. Cannabis was legalized in 2018, but use and simple possession was not enforced before that.
“Cannabis from the 2000s is not the same as in 2025,” … “THC content has increased by 5 times. This is likely a significant driver in the increasing link between cannabis use and schizophrenia.”
This has been known for awhile but it does not really depend on amount used but rather the users genetics. If that user is genetically susceptable then they will have more risk with increased use.
Cannabis users also self medicated for psychological issues. but in Canada, post legalization Schizophrenia is on the increase and higher than comparable countries. The prevalence has doubled since 2002. Cannabis was legalized in 2018, but use and simple possession was not enforced before that.
https://www.sciencedaily.com/releases/2025/08/250811104237.htm