As cannabis laws become liberalised in many countries, experts writing in The Lancet Psychiatry argue that there is an urgent need to explore how cannabis use can be made safer.
The authors say that policy makers and researchers should consider regulating cannabis potency, reducing the use of tobacco (e.g. by using vapourisers), and exploring how the chemical composition of cannabis could be modified to reduce harm without altering the pleasurable effects of the drug.
In the past 40 years, the potency of cannabis has on average doubled worldwide and there is evidence of a greater number of people seeking help for cannabis use disorders in the UK, Europe, and USA.
Despite prohibitive laws on possession and use of cannabis being introduced in the 1960s, cannabis use has increased in most parts of the world, suggesting the laws have had little effect on use and abuse. Uruguay and a number of US...