Lancet - "Continued versus discontinued cannabis use in patients with psychosis: a systematic review and meta-analysis"

"Continued versus discontinued cannabis use in patients with psychosis: a systematic review and meta-analysis"

"Interpretation

Continued cannabis use after onset of psychosis predicts adverse outcome, including higher relapse rates, longer hospital admissions, and more severe positive symptoms than for individuals who discontinue cannabis use and those who are non-users. These findings point to reductions in cannabis use as a crucial interventional target to improve outcome in patients with psychosis."

http://lancet.com/journals/lanpsy/article/PIIS2215-0366(15)00363-6/abstract