Medicinal Cannabis Shows Limited Benefits for Mental Health

A large analysis published in The Lancet has found that medicinal cannabis is not effective in treating anxiety, depression, or post-traumatic stress disorder (PTSD), and may even worsen mental health outcomes. The study, one of the most comprehensive to date, reviewed decades of global research on cannabinoids and mental health conditions.

Despite widespread use—especially in North America, where many individuals rely on cannabis for psychological relief—the findings raise concerns about its routine medical use. Researchers warn that it could increase risks such as psychotic symptoms and cannabis dependency, while also delaying access to proven treatments.

Some limited evidence suggests potential benefits for conditions like insomnia, autism, and Tourette’s syndrome, but the quality of this evidence remains weak. Stronger support exists for its use in epilepsy, multiple sclerosis, and certain pain conditions.

Experts, including those at the American Medical Association, are now calling for stricter regulation and more evidence-based prescribing practices.

20-03-2026