Drug Free Action Alliance is “Clearing the Air” on Teen Marijuana Use

"Is there a link between adolescent marijuana use and the onset of psychosis (severe mental disorder, characterized by derangement of personality and loss of contact with reality)? A number of studies are indicating the answer to be, “yes.” According to at least eight separate studies, subjects who used marijuana during adolescence showed a two-to-four-fold increase in psychosis (namely schizophrenia) in adulthood, compared to those who had not smoked marijuana during adolescence.

"Is there a link between adolescent marijuana use and the onset of psychosis (severe mental disorder, characterized by derangement of personality and loss of contact with reality)? A number of studies are indicating the answer to be, “yes.” According to at least eight separate studies, subjects who used marijuana during adolescence showed a two-to-four-fold increase in psychosis (namely schizophrenia) in adulthood, compared to those who had not smoked marijuana during adolescence. Studies also reveal that among teens, as marijuana use increases, so too does the likelihood of developing psychosis. Combine that with a decreasing number of teens’ perceiving marijuana use to be harmful, and it is a trend that bears watching.

Let’s Be Clear: Are we saying every young person who smokes marijuana will develop psychosis? Absolutely not. We are saying however, that there is mounting evidence to show that increased marijuana use during adolescence, increases an individual’s likelihood of developing psychosis later in life."

–Drug Free Action Alliance

Source: Ferguson, 2010; Hall and Degenbardt, 2009’ Minozzi, et. Al, 2010.