Study: ‘Significant’ negative association between medical cannabis sales, alcohol

A Canadian researcher has found a “significant negative association” between regulated medical marijuana sales and alcohol sales.

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The research by business professor Michael J. Armstrong was published online in the journal Health Policy in November, and compared legal medical marijuana sales to sales of beer, wine, and liquor in Canada from 2015 to 2018.

Armstrong’s study found that each dollar of legal cannabis sold was associated with alcohol sales declines of between 74 Canadian cents (54 cents) and CA$0.84.

However, the Brock University professor said his research did not prove causation.

Armstrong said the research suggests that medical cannabis use replaced some alcohol consumption.

The study found that Canada’s alcohol sales in 2017-2018 were roughly 1.8% lower than they otherwise would have been without regulated medical marijuana.

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The paper also suggested that reduced alcohol sales may partly offset any harms

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