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Endocannabinoid System and Exogenous Cannabinoids in Depression and Anxiety: A Review
Ahmed Hasbi1, Bertha K Madras2,3, Susan R George1,4
1Department of Pharmacology and Toxicology, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada.
Brain Sciences
|February 25, 2023
Summary
Cannabinoids, like THC and CBD, are increasingly used for anxiety and depression. However, current evidence suggests their therapeutic role is weak and of low quality, necessitating further research.
Area of Science:
- Neuroscience
- Pharmacology
- Psychiatry
Background:
- Growing liberalization of cannabis for medical and recreational use.
- Anxiety and depression are frequently cited reasons for cannabinoid consumption.
- Focus on the endogenous endocannabinoid system (ECS) and cannabinoid use for mental health.
Purpose of the Study:
- Explore the link between depression/anxiety and ECS dysregulation.
- Review the use of phytocannabinoids and synthetic cannabinoids for symptom remediation.
- Examine evidence for cannabinoid involvement in mood disorders and their clinical use.
Main Methods:
- Literature review of the endocannabinoid system, cannabinoid receptors, and cannabis constituents.
- Analysis of human and animal model studies on cannabinoids and depression/anxiety.
- Evaluation of existing clinical evidence for cannabinoid efficacy in treating mood disorders.
Main Results:
- Cannabinoids, including THC and CBD, are commonly believed to aid mental health conditions.
- Systematic reviews indicate weak, low-quality evidence for cannabinoid effectiveness in depressive and anxiety disorders.
- Current data offers no clear guidance for using cannabinoids in mental health treatment.
Conclusions:
- High-quality research is urgently needed to assess cannabinoid effects on mental disorders, especially depression and anxiety.
- Long-term use consequences, including addiction and potential worsening of symptoms, require thorough investigation.
- The therapeutic role of cannabinoids in mental health remains uncertain due to insufficient robust evidence.
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