Quadruple convergence – rising cannabis prevalence, intensity, concentration and use disorder treatment

In collating and synthesizing several data sources on cannabis exposure, Manthey and colleagues have elegantly compiled a foundational resource for subsequent epidemiological studies on cannabis use [1]. The study includes an impressive body of evidence on cannabis use prevalence (in the month and year prior to interview), high risk cannabis use (daily or near daily), tetrahydrocannabinol (THC—the principal psychoactive constituent of cannabis) concentration in European cannabis herb and processed resin (cannabis concentrates), and treatment demand for Cannabis Use Disorder (CUD). All four domains studied show a modest to dramatic increases across 2010-2019