Articles on Substance use

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Providing drug users with clean syringes is part of Portugal’s harm-reduction approach to substance use. Horacio Villalobos/Corbis News via Getty Images

Portugal decriminalized drugs 25 years ago, but the real lesson is what it built around this policy

Portugal’s remarkable public health strides after changing its approach to drugs may not be replicable in other countries absent broader systemic reforms.
The reported rate of murder and nonnegligent manslaughter may be the lowest since reliable national data began to be collected in 1960. Jeremy Hogan/Photodisc via Getty Images

The US murder rate fell to historic lows in 2025 – here’s why

Most people credit policing or the lack of it, but the real story tracks three trends that rose and fell together.
New research suggests substance use among Canadian schoolkids is a problem. A new strategy aims to tackle it more effectively. (Sebastian Radu/Unsplash)

No more ‘just say no’ — Canadian schools will soon have a roadmap to address student substance use

A new cross-Canada standard sets out what evidence-informed substance use prevention, education and intervention should look like from kindergarten through Grade 12.
The Ontario government is closing supervised drug consumption sites throughout Ontario. Ontario Premier Doug Ford, seen here in the Legislature during Question Period on March 24, 2026, has called the sites a failed experiment, but the evidence is mixed. THE CANADIAN PRESS/Frank Gunn 

Ontario is closing its supervised consumption sites, calling them a failure. So what counts as ‘success?’

Supervised consumption sites have real shortcomings. But the government’s case for closing them relies on a narrow definition of success and abandons the people the sites were designed to reach.
While abstinence is a worthy long-term goal for many people, starting with evidence-based moderation-management techniques and harm-reduction strategies can help people begin transforming their relationship with alcohol or cannabis. (Canva)

Dry January, T‑breaks and the myth of willpower: An alternative reset in the New Year

Though well-intentioned, abstinence-based resolutions can result in a return to use because these approaches reduce complex human behaviour to an on-off switch.
Deaths from liver disease have been increasing dramatically in Canada and the United States over the past two decades. THE CANADIAN PRESS/Darryl Dyck

How alcohol contributes to the epidemic of liver disease

Liver harm caused by alcohol is a public health problem. Collectively, we need to take better care of our livers by taking steps to reduce alcohol consumption in the population.
Your memories are likely stored in ensembles of neurons that fire together. PASIEKA/Science Photo Library via Getty Images

Memories of the good parts of using drugs can keep people hooked − altering the neurons that store them could help treat addiction

Your brain processes the pleasure of everyday behaviors like eating and drinking similarly to the pleasure of using drugs. Disentangling them requires understanding how memories are formed.

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