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Article review 2 April 2026

Джек Уилсон: Каннабис не лечит тревожность и усугубляет ментальные проблемы

Jack Wilson: Cannabis Does Not Treat Anxiety and Worsens Mental Health Problems

Jack Wilson: El cannabis no trata la ansiedad y agrava los problemas de salud mental

Jack Wilson: Cannabis Does Not Treat Anxiety and Worsens Mental Health Problems

In recent years, medical marijuana has acquired in public perception the reputation of a universal antidepressant and powerful tranquilliser. Against the backdrop of a global wave of legalisation, huge numbers of people have begun using cannabis-based products to self-treat anxiety disorders, severe depression and post-traumatic stress disorder (PTSD). Yet a large meta-analysis published in the prestigious medical journal The Lancet deals a crushing blow to this popular myth. Having examined data from 54 clinical trials covering the period from 1980 to 2025, researchers proved that cannabis use is ineffective for treating mental health conditions and can cause harm.

The research group led by Dr Jack Wilson of the Matilda Centre at the University of Sydney undertook colossal work in search of evidence of marijuana’s therapeutic benefit — and arrived at stunning conclusions. Specialists not only found a complete absence of data showing improvement in depression but also identified compelling evidence of cannabis’s failure to address clinical anxiety and PTSD. Moreover, the researchers report a direct threat to the psychological well-being of patients. By using marijuana, a person receives only an illusion of momentary relief that deceptively masks symptoms while allowing the underlying condition to progress unchecked.

Practising psychotherapists and psychiatrists have observed this trap ensnaring their patients for years. Dr Wilson emphasises that such self-medication radically delays the moment when a patient could access scientifically grounded, genuinely effective help. Furthermore, the regular influence of psychoactive substances on the brain elevates the long-term risk of developing full-blown psychosis. This risk is particularly high today: modern cannabis products contain steadily increasing proportions of THC — the intoxicating component — displacing the milder and more calming CBD (cannabidiol). Additionally, one alarming finding emerged: in people with a prior cocaine addiction, marijuana use triggered a sharp increase in cravings for the hard drug.

The only glimmer of hope in this sobering clinical review concerns physiological and neurological disorders. Scientists found modest potential for cannabis in relieving symptoms of epilepsy, Tourette syndrome and chronic insomnia — though they were quick to note that the quality of the evidence base in these areas currently remains extremely low.

In today’s world, where cultural perceptions of psychoactive substances are rapidly shifting toward greater tolerance, these findings represent a vital wake-up call. While the clinical community rightly experiences enthusiasm about the therapeutic application of certain medical psychedelics such as psilocybin, placing analogous hopes on cannabis for mental health is unwarranted — its use demands extreme caution rather than blind trust.

Jack Wilson

Psychiatrist and researcher

Dr Jack Wilson leads the research group at the Matilda Centre, University of Sydney, specialising in studying the effects of psychoactive substances on mental health.

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