Schizophrenia Linked to Cannabis Use Disorder Is Increasing, Study Finds

Close-up of Cannabis sativa L. by Skalle-Per Hedenhös. (This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license. The original file was resized and compressed.)

A study from Denmark shows that schizophrenia associated with cannabis use disorder (marijuana addiction) has increased significantly over the last 25 years. The longitudinal study, which looked at the population of Denmark, found that schizophrenia linked to cannabis use disorder increased from 2% in 1995 to approximately 6% or 8% since 2010.

According to the study, this increase can be explained by the increase in the potency of marijuana and its use. The authors conclude: “This finding has important ramifications regarding legalization and control of use of cannabis.” Recreational marijuana is currently illegal in Denmark.

The study was published in JAMA Psychiatry on July 21. CNN also reported on this study.

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