CBD reduced precuneus brain activation during exposure to alcohol-related visual cues in people with alcohol use disorder, though it did not affect craving, mood, or cognitive functioning.
Addiction neuroscientists and researchers developing novel AUD pharmacotherapies.
CBD reduced precuneus brain activation during alcohol cue exposure in an exploratory whole-brain analysis
What the researchers found
In 22 non-treatment-seeking AUD participants, 800 mg CBD did not affect alcohol cue-elicited brain activation in pre-specified regions of interest. However, exploratory whole-brain analysis revealed CBD significantly reduced precuneus activation, a region involved in self-referential processing and reward. No effects on acute craving, mood, or cognitive functioning were observed.
Why it matters
The precuneus plays a role in self-referential thinking and reward processing, both relevant to addiction. CBD modulation of this region during alcohol cue exposure could represent a neural mechanism for reducing alcohol-related responses.
The numbers in context
22 participants, mean age 29, 800 mg CBD or placebo in crossover design. No significant effects in ROI analysis. Significant CBD effect in precuneus in exploratory whole-brain analysis. No effects on craving, mood, or cognition.
How the study worked
Crossover double-blind randomized trial with 22 AUD participants (mean age 29) receiving 800 mg CBD or placebo. fMRI measured brain activation during an alcohol cue reactivity task. Secondary outcomes included mood, craving, and cognitive functioning.
What this study cannot tell us
Very small sample (n=22). The precuneus finding was exploratory (not pre-specified). Non-treatment-seeking participants may differ from clinical populations. The lack of craving effects limits clinical significance. Single-dose design.
How to read the evidence
Double-blind crossover RCT with fMRI is methodologically strong, but small sample and exploratory nature of the key finding reduce confidence.
When this study was published
2025 publication.
The bigger picture
Combined with the companion neurometabolite study (RTHC-06701), these findings suggest CBD may modulate alcohol-related brain processes at multiple levels, from neurochemistry to functional activation, though the effects are subtle and context-dependent.
Questions still open
- Would treatment-seeking AUD patients show larger CBD effects on cue reactivity?
- Does precuneus modulation translate to reduced drinking behavior over time?
Read the original research
Cannabidiol attenuates precuneus activation during appetitive cue exposure in individuals with alcohol use disorder.
European archives of psychiatry and clinical neuroscience, 275(7), 2129-2139
Citation
Hurzeler, Tristan; Logge, Warren; Watt, Joshua; McGregor, I S; Suraev, Anastasia; Haber, Paul S; Morley, Kirsten C. (2025). Cannabidiol attenuates precuneus activation during appetitive cue exposure in individuals with alcohol use disorder.. European archives of psychiatry and clinical neuroscience, 275(7), 2129-2139. https://doi.org/10.1007/s00406-025-01983-4
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