As cannabis use becomes more normalized across North America, new research is raising important questions about its impact on our mental and physical health.
Teens' cannabis use linked with mental health, driving risks.While the recent legalization of cannabis in many jurisdictions in North America has led to greater acceptance of and a rise in cannabis usage, research findings on the impacts of cannabis continue to raise concerns among medical and mental health professionals, and in the public.
of Canadian attitudes regarding cannabis usage and safety five years following its legalization, for example, found that while cannabis usage has become more acceptable, concerns about use disorders, its usefulness in treatingto Pew Research, as of July 2025, eight out of 10 Americans live in a county with one or more cannabis dispensaries. In Canada, where cannabis usage has been legal since 2018, cannabis is widely available in retail stores and online. According to the Canadian Centre for Substance Use andKnowing what is good for us — and what is not — is critical to making healthy choices that support our physical and mental health and overall well-being. Here’s a look at some of the latest research on the impacts of cannabis usage.on the efficacy and safety of cannabis for treating mental health disorders reported very little evidence supporting its effectiveness in treating anxiety, depression, post-with CNN, Jack Wilson, lead author of the study and postdoctoral research fellow at the University of Sydney’s Matilda Centre for Research in Mental Health and Substance Use explained: “We found no evidence any form of cannabis is effective in treating anxiety, depression or post-traumatic stress disorder, which are three of the leading reasons for which cannabis is prescribed.” These findings align without of McGill University that linked cannabis usage to health records identified daily or near-daily cannabis usage before the age of 15 to individuals seeking treatment for mental health conditions, including depression, anxiety, andfrom the School of Public Health at the University of Saskatchewan, measuring speed, reaction time, and crash rates, found that 75 percent of teens and young adults crashed in driving simulation tests up to 6 hours after consuming 1 mg of cannabis with THC. of a recent cross-sectional study of 1003 young adults, which suggests a troubling impact of cannabis use on brain function, “suggest that cannabis use is associated with short- and long-term brain function outcomes, especially during workingis a serious condition linked to frequent cannabis usage, with troubling symptoms, including severe nausea, vomiting, and abdominal pain. A 2025 study examining emergency room visits related to CHU found that, in 2022, the rate rose to 22.3 per 100,000, from 4.4 per 100,000 in 2016. A recently publishedexploring cannabis use patterns in individuals suffering from CHU found the use of vape cartridges to be linked to a shorter timeframe in developing CHS symptoms. This new research further raises concerns around the potentialof habitual cannabis usage, including cannabis use disorder, cast a shadow over the pleasant side effects of recreational cannabis use. The reality is that knowledge is power, and the more we know about the potential risks and problematic impacts of cannabis usage on our mental and physical health, the better able we are to make informed choices, recognize and manage our symptoms, and create habits that support our health and If you are concerned about recent research findings about the impacts of cannabis usage, it is important to build an awareness of your habits and symptoms, and to take action if you would like to take control of your cannabis usage. You can:of your usage habits. Be honest with yourself about how often and how much cannabis you consume. Consider whether your consumption has risen in the past year.if you are struggling to manage your cannabis consumption. Find a TherapistSelf Tests are all about you. Are you outgoing or introverted? Are you a narcissist? Does perfectionism hold you back? Find out the answers to these questions and more with Psychology Today.
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