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Marijuana Minute, Aug 04 2014: Is Marijuana Use Related to Psychotic Diseases Like Schizophrenia?

Is there a link between Schizophrenia and marijuana use? According to a recent article from the New York Times, there is evidence to suggest it is possible, but whether it’s caused by or simply related is unclear.
In a recent Yale University study it was determined likely that 8-14% of schizophrenia cases may be due to cannabis use. But the study also acknowledged that no plausible biological mechanism by which cannabis could cause such an increase in psychosis could be established. The fact that although the last four decades have shown enormous increase in cannabis use, there has been no commensurate increase in psychotic disorders such as schizophrenia.
Another study by the National Institute on Drug Abuse conclude that long term heavy marijuana use could lead to an increased risk of chronic psychosis disorders in persons who also have a predisposition. But because so many other factors lead to the diseases, it could not be determined if the cannabis use caused or is simply “linked” or “related”.
A 2010 Australian study also concluded that vast data indicates no conclusive link to cannabis causing psychotic disorders such as schizophrenia.

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