Print Edition - 2019-03-21  |  Health and Living

Cannabis linked to psychosis

  • NEW STUDY

Mar 21, 2019-

People who use cannabis every day run a significantly higher risk of developing the serious mental illness psychosis, especially if they use more potent forms of the drug, such as skunk. A large international study conducted in one site in Brazil and across 11 sites in Europe—including in Amsterdam, London and Paris—found that people who used cannabis daily were three times more likely to have an episode of psychosis than people who had never used it. Potent cannabis types with more than 10 percent of the psychoactive ingredient THC were linked to a five times greater risk.

The study is the first to show the impact of cannabis use on population rates of psychosis, and should highlight the potential public health impact of changes to drugs laws. Many countries have legalised or decriminalised cannabis use, leading to some concerns about increased use and its potential harm.

An estimated one in five new cases of psychosis across the sites studied could be linked to daily cannabis use, and more than one in 10 linked to use of high-potency cannabis. This would mean that if high potency cannabis were no longer available, the incidence of psychosiswould be expected to drop. (Reuters)

Published: 21-03-2019 10:00

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