CBD treatment during a period of social defeat stress in mice prevented the development of social avoidance and blocked the stress-induced enhancement of cocaine reward, while normalizing gene expression in serotonin, endocannabinoid, and stress hormone systems.
Researchers studying CBD for stress-related disorders and the intersection of trauma and addiction vulnerability.
CBD prevented both social avoidance and cocaine reward potentiation
What the researchers found
CBD (30 or 60 mg/kg) given during intermittent social defeat prevented social interaction deficits and the potentiation of cocaine conditioned place preference that normally follows stress exposure. CBD did not prevent anxiety-like effects. Gene expression analysis revealed that social defeat reduced expression of serotonin transporter, CRF, POMC, and cannabinoid receptors, and CBD reversed these reductions.
Why it matters
Social stress is a major risk factor for both mood disorders and substance use disorders in humans. This study shows that CBD given during the stress exposure period can prevent two key consequences: social withdrawal (relevant to depression/PTSD) and increased vulnerability to addictive drugs, while identifying the brain systems involved.
The numbers in context
CBD doses: 30 and 60 mg/kg. 4 defeat episodes (PND 47, 50, 53, 56). CBD reversed social interaction deficit and cocaine preference potentiation. Anxiety-like effects not reversed. Gene expression reductions in 5 of 6 targets reversed by CBD (all except glucocorticoid receptor).
How the study worked
Male mice received CBD (30 or 60 mg/kg) and were exposed to four episodes of social defeat on postnatal days 47-56. Behavioral tests assessed social interaction, anxiety, and cocaine reward. Gene expression of serotonin transporter (dorsal raphe), CRF (paraventricular nucleus), POMC (arcuate nucleus), and glucocorticoid/cannabinoid receptors (hippocampus) was measured after the last defeat episode.
What this study cannot tell us
Male mice only; female responses may differ. Social defeat in mice is an approximation of human social stress. CBD doses were relatively high and may not translate directly to human dosing. Only cocaine reward was tested; other drugs may respond differently.
How to read the evidence
Well-designed animal study with behavioral and molecular endpoints. Preliminary evidence that requires replication in females and extension to human-relevant paradigms.
When this study was published
Published in 2025.
The bigger picture
The co-occurrence of PTSD/depression and substance use disorders is one of the biggest challenges in mental health treatment. If CBD can prevent both the mood and addiction-vulnerability consequences of social stress, it could represent a fundamentally new approach to treating or preventing these commonly co-occurring conditions.
Questions still open
- Would CBD be effective if given after stress exposure rather than during it? Do these findings extend to female mice and other models of stress? Could CBD prevent substance use vulnerability in humans exposed to trauma?
Common questions
Could CBD prevent PTSD in humans?
Why did CBD prevent cocaine vulnerability but not anxiety?
Read the original research
Cannabidiol prevents social avoidance, potentiation of cocaine reward and gene expression alterations induced by exposure to intermittent social defeat in mice.
Neuropharmacology, 279, 110630
Citation
Martínez-Caballero, Maria Ángeles; Navarro, Daniela; Calpe-López, Claudia; Torregrosa, Abraham B; García-Pardo, Maria Pilar; Manzanares, Jorge; Aguilar, Maria Asunción. (2025). Cannabidiol prevents social avoidance, potentiation of cocaine reward and gene expression alterations induced by exposure to intermittent social defeat in mice.. Neuropharmacology, 279, 110630. https://doi.org/10.1016/j.neuropharm.2025.110630
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