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The Guardian - AU
The Guardian - AU
Politics
Natasha May

No evidence cannabis reduces long-term illicit opioids use, study finds

Jack Wilson Opioids United States Heroin University of Sydney
Cannabis
A study led by the University of Sydney, published in the American Journal of Psychiatry, followed 615 people with heroin dependence, many of whom also used cannabis (pictured) over 20 years. Photograph: Rungroj Yongrit/EPA

Cannabis should not be considered an effective long-term strategy for reducing opioid use, according to a new study released amid the global shift towards cannabis legalisation.

A study led by the University of Sydney, published on Wednesday in the American Journal of Psychiatry, followed 615 people with heroin dependence, many of whom also used cannabis, over 20 years.

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