A small effect on people who were already at risk. The sky is hardly falling with legalization.
Emphasis mine. This seems interesting to me. Earlier diagnosis is not more diagnosis. It could just mean that due to illegality, these people got into contact with mental health professionals earlier than they would have otherwise. Also getting the diagnosis earlier. But not being more schizophrenic.
> probable
Citation:
> The relation between cannabis and schizophrenia needs further investigation. We need more case-control studies and clinical trials with a larger population to get conclusive data.
It is a well-known fact that many of the abuse substances cause psychosis, which is a part of the schizophrenia spectrum; cannabis is one [9]
Nevertheless, the fact remains that schizophrenia and psychosis walk hand in hand alongside with cannabis use. Cannabis has many strains with different ratios of components. The ratio of THC and CBD is the most important psychotomimetic property of any cannabis strain [14]. When a healthy person uses cannabis, he experiences relaxation, euphoria, and a decrease in anxiety and boredom. However, they might also have some undesirable effects like paranoia, grandiosity, agitation, hallucination, cognitive impairment, disorganized thinking and behavior, and depersonalization [17]. People predisposed to the development of psychotic illness are more vulnerable to the psychotomimetic effects of cannabis, more specifically, THC [16,17].
Per se cannabis does not cause schizophrenia or psychosis. However, we have longitudinal data supporting the causal link between cannabis and psychosis [18].