Doctors have long known that excessive marijuana use can trigger psychosis, especially in the young. But new research suggests the link is stronger that ever imagined before.
The teen years may be an especially vulnerable time in this regard, the researchers noted.in adolescence. Surprisingly, we didn't find evidence of association in young adulthood,” said lead author André McDonald, who led the study as part of his PhD work at the University of Toronto.McDonald finished the research while at the Institute for Clinical Evaluative Sciences .
In fact, 5 of every 6 teens admitted to the hospital for a psychotic episode had a history of marijuana use, the study found. The study could only show an association between weed use and psychosis, not cause-and-effect. It's possible that teens who were already vulnerable to psychosis were more prone to "self-medicating" with marijuana, for example. Genetics and personal traumas in the teens' lives might also play a role.
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