Daily use and high-potency cannabis linked to higher rates of psychosis

The Lancet Psychiatry
Published March 19, 2019 19:30 EDT (News release from The Lancet)
In cities where high potency cannabis is widely available, such as London and Amsterdam, a significant proportion of new cases of psychosis are associated with daily cannabis use and high-potency cannabis. The authors estimate that one in five new cases (20.4%) of psychosis across the 11 study sites may be linked to daily cannabis use, and one in ten (12.2%) linked to use of high-potency cannabis.

Corresponding author: Marta DiForti, King’s College London – marta.diforti@kcl.ac.uk