Trends in Psychiatry and Psychotherapy
https://trends.org.br/article/doi/10.47626/2237-6089-2021-0239
Trends in Psychiatry and Psychotherapy
Review Article

Non-medical cannabis use: international policies and outcomes overview. An outline for Portugal

Pedro Cabral Barata, Filipa Ferreira, Catarina Oliveira

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Abstract

Introduction
Cannabis is probably the most commonly used illicit drug. It is often regarded as a relatively nonharmful experience, even though evidence indicates otherwise. Legalization of non-medical cannabis, which has already taken place in several countries, is currently a controversial issue.Objective: To provide an up-to-date overview of current models and policies and their outcomes that can inform future political decisions regarding non-medical cannabis use. 

Methods
PubMed/MEDLINE and Google Scholar scientific databases were searched for articles written in English, Spanish, and Portuguese published between 1990 and December 2020. The reference lists of these articles were similarly used as bibliography sources. Gray literature was also included. 

Results
While non-medical cannabis has been decriminalized in many countries, it has only been legalized in Uruguay, Canada, and some U.S. states. Several benefits of legalization were identified: decreases in cannabis-related crimes, law-enforcement and judicial costs; reduction in synthetic cannabis supply; decline in black economies and possible diminution of other illegal drug buying; and tax revenue increases. Reported legalization problems included: increases in cannabis use; cannabis-related disorders; and cannabis-related accidents and hospitalizations. Harm-reduction strategies are available in the scientific literature. 

Conclusion
Growing, although incomplete, evidence exists to guide policy makers, minimize cannabisrelated harm, and positively contribute to public health, if the legalization path is to be followed. Dialogue between legislators and science should be encouraged. There are more than a few legalization pathways, with diverse economic, social and health wellbeing effects. Public health-driven, instead of profit-driven models, seem to offer the most benefits regarding non-medical cannabis legalization. Most of the true public health effects of cannabis legalization are still unknown, for we are still in the early stages of these policies and their implications. Future studies should address the medium-to-long-term social, economic, and health consequences of legalization policies.

Keywords

Cannabis legalization, non-medical cannabis, Portugal, cannabis decriminalization

Submitted date:
02/22/2021

Accepted date:
07/20/2021

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