Brain researcher cautions against suggestions cannabis causes schizophrenia

Matthew Hill, of the University of Calgary's Hotchkiss Brain Institute has published a Perspective piece in the journal Nature voicing his concerns about other academics and journalists who suggest that cannabis use causes schizophrenia. He points out that there is little evidence of such a connection and suggests that there is actually evidence that cannabis use does not cause the mental disorder.

Hill had an article published last year in the Journal of Psychiatry & Neuroscience, called "Clearing the smoke: What do we know about adolescent cannabis use and schizophrenia?" in which he outlined studies that have been conducted to determine if cannabis does indeed cause schizophrenia—the first of which was conducted back in 1987 in Sweden, and did find such an association—army conscripts who used cannabis were found to have a higher incidence of schizophrenia. It was this study that has led to the common belief today that the drug causes the...

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