The question, "Does Cannabis use cause schizophrenia?" is still routinely answered by mainstream media and many in both private and public health systems, the pharmaceutical industry and law enforcement (just to name a few with a seemingly vested interest in the illegality of Cannabis) with a resounding "yes", but they are all patently wrong. While studies have shown Cannabis use is associated with schizophrenia, this is a very different claim. Scientists suggest people at risk of schizophrenia might actually use Cannabis to mitigate early symptoms of the condition and that this is the reason for the association. The claim, then, confuses correlation with causation. Furthermore, if Cannabis use caused schizophrenia, we would presumably see changes in schizophrenia rates based on levels of Cannabis use. But during a period when Cannabis use increased fourfold in the UK (1970–2010), the incidence of schizophrenia remained essentially stable. In 2013 research by Harvard Medical School, published in Schizophrenia Research from a comparison between families with a history of schizophrenia and those without, found little support for Cannabis use as a cause of schizophrenia. "The results of the current study suggest that having an increased familial morbid risk for schizophrenia may be the underlying basis for schizophrenia in Cannabis users and not Cannabis use by itself”.
A: Sheriff Urquhart: "The truth of the matter is that regulation will come with harms. The key is weighing the costs and benefits of a regulated v's unregulated market. We have been fighting a futile drug war for over 40 years. I'm pleased we are not allowing the fear of change to impede the search for a better way".
Adapted from, Separating Fact From Fiction In The Cannabis Debate with Here's Why We Hear So Many False Claims About Cannabis, How Cannabis Legalization Has Impacted Impaired Driving in Washington State, Impact of Regulation on Drug Crime & Impaired Driving, Using Evidence to Talk About Cannabis, Toward a Global View of Alcohol, Tobacco, Cannabis, and Cocaine Use: Findings from the WHO World Mental Health Surveys, Marijuana and Driving, Epidemiology and consequences of drinking and driving, Drug use and fatal motor vehicle crashes: A case-control study, Marijuana use and motor vehicle crashes, Schizophrenia and Psychoses/Cannabis and Schizophrenia -Trigger or Treatment