Long-time cannabis use linked to psychosis: study [View All]

[UpInArms]

Source: AFP

WASHINGTON — The longer people use cannabis or marijuana, the more likely they are to experience hallucinations or delusions or to suffer psychosis, according to a study released Saturday.

The study found that people who first used cannabis when they were aged 15 or younger were twice as likely to develop a "non-affective psychosis" -- which can include schizophrenia -- than those who had never used the drug.

The research led by John McGrath from the University of Queensland in Australia was based on a survey of 3,801 people with an average age of 20.1 years, the US-based Archives of General Psychiatry reported.

"Among all the participants, a longer duration since the first time they used cannabis was associated with multiple psychosis-related outcomes," the study said.

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