Abstract
Purpose of Review
Preclinical studies have demonstrated that cannabidiol improves depressive-like behaviors in animal models, raising its plausibility to be investigated as a treatment for major depressive disorder (MDD) and bipolar disorder (BD). Therefore, our aim is to review the available clinical data of cannabidiol in the treatment of mood disorders.
Recent Findings
There are no published randomized clinical trials (RCTs) that investigated the efficacy of cannabidiol in mood disorders, either alone or in combination with other cannabinoids. Similarly, there are no published trials with affective symptoms as the primary outcome. There are a few studies which investigated mood symptoms as secondary outcomes within medical conditions or non-mood disorder psychiatric conditions, and the results are conflicting due to the methodological differences between studies. Nevertheless, studies have found cannabidiol to be well-tolerated with few adverse effects such as diarrhea and somnolence.
Summary
There are no RCT data for the efficacy of cannabidiol in the treatment of MDD or BD, but few studies assessed its efficacy on mood symptoms as secondary outcomes in medical and non-psychiatric disorders populations with conflicting results. Thus, currently, there is insufficient evidence to recommend cannabidiol as a treatment for mood disorders, and high-quality clinical trials are urgently needed.
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LNY has been on speaker or advisory boards for, or has received research grants from, Alkermes, Abbvie, AstraZeneca, Bristol- Myers Squibb, Canadian Network for Mood and Anxiety Treatments, Canadian Institutes of Health Research, Sumitomo Dainippon Pharma, Eli Lilly, GlaxoSmithKline, Intracellular Therapies, Janssen, Merck, the Michael Smith Foundation for Health Research, Pfizer, Sanofi, Servier, Sunovion, and the Stanley Foundation, all outside this work. AS has been on speaker or advisory boards for AbbVie, Otsuka, Lundbeck, and GlaxoSmithKline. JVP and MLZ report no biomedical financial interests or potential conflicts of interest.
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This article is part of the Topical Collection on Novel Therapeutics in Mood Disorders
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Pinto, J.V., Ziak, M.L., Schaffer, A. et al. Cannabidiol in the Treatment of Mood Disorders. Curr Treat Options Psych 9, 140–150 (2022). https://doi.org/10.1007/s40501-022-00265-3
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DOI: https://doi.org/10.1007/s40501-022-00265-3