Is Medicinal Cannabis Really Effective? A Comprehensive Review
Medicinal cannabis has gained popularity in recent years as a treatment for various conditions, but a new comprehensive review suggests that there may not be enough scientific evidence to support its effectiveness in many cases. While some researchers question the findings, the review highlights important considerations for those considering using medicinal cannabis.
A team of researchers in the US conducted a thorough analysis of 124 studies, selected from over 2,500 papers published between January 2010 and September 2025. The review confirmed that medicinal cannabis can be beneficial for certain FDA-approved conditions, such as reducing chemotherapy-induced nausea and vomiting, improving appetite in HIV patients, and treating severe seizure disorders in children.
However, the review also noted that these cases were exceptions rather than the rule. The authors stated that evidence from randomized clinical trials does not support the widespread use of cannabis or cannabinoids for many conditions for which it is commonly promoted, such as acute pain and insomnia.
Furthermore, the review highlighted potential health risks associated with frequent use of inhaled or high-potency cannabis, including an increased risk of psychotic symptoms, generalized anxiety disorder, and cardiovascular disease.
Lead author Michael Hsu, a clinical researcher at the University of California, Los Angeles, emphasized the need for more balanced and high-quality research on medicinal cannabis. He highlighted the significant gap between public perception and scientific evidence regarding the effectiveness of cannabis for most medical conditions.
While some scientists agree with the review’s conclusions, others have raised concerns about the methodology and potential bias in the selection of studies. Simon Erridge, Director of Research at Curaleaf Clinic in the UK, pointed out that the review may have emphasized negative outcomes while downplaying research suggesting therapeutic benefits.
Despite its limitations, including the possibility of missing relevant articles and a lack of systematic review methodology, the review underscores the importance of further research to better understand the potential benefits and risks of using medical cannabis. Hsu and his co-authors stress the need for more rigorous studies to provide clearer guidance and improve clinical care for patients.
The research findings were published in The Journal of the American Medical Association, highlighting the ongoing debate surrounding the efficacy of medicinal cannabis and the need for more comprehensive research in this field.
