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Worrying link between cannabis use and anxiety revealed in new study and the impact could be deadly

Home> News> Health

Published 17:25 2 Mar 2026 GMT

Worrying link between cannabis use and anxiety revealed in new study and the impact could be deadly

Canadian researchers studied marijuana users for a decade

Britt Jones

Britt Jones

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A new study into marijuana has revealed the ‘strong’ link between anxiety and depression.

Even though cannabis is legalized in as many as 24 US states to use recreationally, as well as medicinal purposes, it doesn’t mean the devil’s lettuce is all beneficial.

Whether it's giving you sleep problems, raspatory irritation, or like the Cleveland Clinic states, lower life achievements – there are some downsides to toking the smoke.

However, that hasn’t stopped nine in 10 adults from agreeing the drug should be prescribed as medication.

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Would they change their minds if they knew it could lead to detrimental effects on mental health?

Canadian researchers linked cannabis to mental health issues (Getty Stock Images)
Canadian researchers linked cannabis to mental health issues (Getty Stock Images)

According to a Canadian study, there is a growing connection between cannabis use and people reporting symptoms of anxiety and depression.

Previously, it was even linked to instances of psychosis.

But McMaster University’s study, which was published in The Canadian Journal of Psychiatry, has revealed it could also give people depressive disorders.

“We see that Canadians who use cannabis tend to be more likely to meet criteria for anxiety and depressive disorders, and more likely to report suicidality,” said Jillian Halladay, an assistant professor in the School of Nursing at McMaster. “We also see that this co-occurrence has strengthened over time.”

According to the McMaster press release, the researchers analyzed more than 35,000 Canadians aged 15 and over between 2012 and 2022 to learn more about the impact on their mental health.

What they found was that those who reported having generalized anxiety disorder and major depressive episodes nearly doubled.

People reported more depressive and anxiety disorders (Getty Stock Images)
People reported more depressive and anxiety disorders (Getty Stock Images)

While people reporting suicidal thoughts in adulthood didn’t change, it did increase by 44 per cent in youths, and that people who smoked weed multiple times a week were five times more likely to report anxiety, suicidality or depression, with Halladay stating: “This extends our prior study that similarly found a strengthening in the co-occurrence of cannabis use and these mental health problems between 2002 and 2012.”

“It’s important for people to recognize when and how their cannabis use may be impacting their mental health, and how their mental health may be influencing their cannabis use,” Halladay urged after explaining their findings.

This comes after recent research from McMaster found anxiety and depression rates in teenagers increased nearly three-fold over the last ten years.

The study found that rates of anxiety and depression were higher in youths who use cannabis heavily as opposed to minimally.

Featured Image Credit: THOMAS SAMSON/AFP via Getty Images

Topics: Drugs, Mental Health, Health

Britt Jones
Britt Jones

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