Association between cannabis use in young adults and psychosis: a systematic review

Abstract

Introduction: Cannabis remains the most prevalent drug worldwide, with an estimated 219 million users in 2021 (or 4.3% of all adult people worldwide). Globally, one in every 17 persons reported using drugs in 2021, which is 23% higher than ten years prior. According to the World Drug Report in 2021 5,3% of 15-16 year olds globally reported using cannabis within the previous year[1]. Psychosis remains as a major public health concern as a potential side effect of cannabis use[2]. Numerous studies indicate that individuals who use cannabis regularly run a higher chance of developing psychosis[2]. Most importantly, greater cannabis usage is linked to increased psychological symptoms in people under the age of 25, particularly in those who are already predisposed to or vulnerable to such effects[3]. that beeing, a family history of psychosis[4].