Overuse of high-potency cannabis could be linked to a sharp increase in schizophrenia cases in Canada, according to a new study that calls for a review of the drug’s long-term effects.
The study, published in the journal JAMA Network Open, found that the number of new schizophrenia cases linked to cannabis use disorder, CUD, has more than doubled in Ontario, rising from 4 per cent to 10 per cent after the legalisation of the drug.
