Impact evaluations of drug decriminalisation and legal regulation on drug use, health and social harms: a systematic review

Abstract Objectives: To review the metrics and findings of studies evaluating effects of drug decriminalisation or legal regulation on drug availability, use or related health and social harms globally. Design: Systematic review with narrative synthesis. Data sources: We searched MEDLINE, Embase, PsycINFO, Web of Science and six additional databases for publications from 1 January 1970 through 4 October 2018. Inclusion criteria: Peer-reviewed articles or published abstracts in any language with quantitative data on drug availability, use or related health and