Modern cannabis is a recipe for psychosis

Today’s high potency cannabis is a risk factor for dependence, poor psychosocial outcomes and psychosis, Australian researchers report.

Writing in The BMJ, Professor Wayne Hall and Professor Louisa Degenhardt say young people should be warned of the dangers of cultivated cannabis, which is characterised by high levels of tetrahydroncannabinol - the chemical responsible for most of the drug’s psychological effects.

“Regular cannabis use is a