Akshay Syal, M.D., is a medical fellow with the NBC News Health and Medical Unit.
Teenagers who used cannabis within the last year had a dramatically higher rate of developing a psychotic disorder, according to a study published Wednesday. The study, led by researchers from the University of Toronto, found an 11 times higher risk of developing a psychotic disorder among teenagers who used cannabis compared with those who did not.
“There’s something about that stage of brain development that we haven’t yet fully characterized — where there’s a window of time where cannabis use may increase the risk of psychosis,” said Dr. Kevin Gray, a professor of psychiatry and director of addiction sciences at the Medical University of South Carolina who was not involved with the study. “This study really puts a fine point on delaying cannabis use until your 20s may mitigate one of the most potentially serious risks.
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