The study published in the Lancet looked at 800 people aged between 18 and 65 in south London, including 410 who had suffered psychosis and 370 healthy patients.
Scientists found such potent forms of the drug increased the likelihood that a user would develop the condition. Casual users of the stronger variants of the class B substance have been found to be three times more likely to develop psychosis, while heavy users are five times more likely.
To read the full article please click the link here: http://news.sky.com/story/1428163/potent-cannabis-linked-to-psychosis-cases
Anyone concerned about their use of any drugs can contact our local services for help and advice.