Highs and downs: A scoping review of public opinion about cannabis, alcohol and tobacco in Canada.

Issues: Since the legalisation of cannabis in October 2018, Canada has emerged as a privileged place for research on the properties of this substance, its health effects, but also on its relation with public opinion. However, this scoping review points out the complexity of tracing the evolution of Canadian public opinion on cannabis based on available scientific data.

Approach: This review follows the guidelines of the Joanna Briggs Institute and summarises more than 60 years of research on Canadians' public opinion, perception and knowledge of cannabis.