CBD Reduces Cocaine Use in Female Mice — But Dose Matters a Lot | Research

The takeaway

Low-dose CBD (10 mg/kg) reduced cocaine self-administration in female mice, while higher dose (20 mg/kg) had paradoxical effects, highlighting complex dose-dependent and sex-specific actions.

Addiction researchers, sex-differences neuroscientists, CBD pharmacology researchers

What the researchers found

In female mice, 10 mg/kg CBD attenuated cocaine self-administration acquisition by altering reward and cognitive markers in the mesocorticolimbic pathway. Conversely, 20 mg/kg increased cocaine consumption after punishment but reduced cocaine-seeking upon re-exposure to punishment cues and upregulated Htr1a (serotonin receptor) in the prefrontal cortex. Male mice showed no effects after punishment.

Why it matters

Cocaine use disorder has no approved medications, and women progress faster to addiction with worse outcomes. Finding that CBD modulates cocaine behavior in females specifically could open a sex-specific treatment approach.

The numbers in context

Two CBD doses: 10 mg/kg (reduced acquisition) and 20 mg/kg (complex effects). Female-specific effects. 20 mg/kg upregulated Htr1a in medial prefrontal cortex. Males showed no effects after punishment paradigm.

How the study worked

Female (and parallel male) mice received CBD at 10 or 20 mg/kg before intravenous cocaine self-administration testing. CBD's pharmacological profile was evaluated on anxiety-like and cognitive tasks. Effects on reward, cognitive, and serotonergic markers in the mesocorticolimbic pathway were assessed.

What this study cannot tell us

Mouse model with intravenous self-administration — different from human cocaine use patterns. Only two CBD doses tested. Sex differences observed in one paradigm (punishment) may not extend to others. Short-term study cannot address chronic treatment effects.

How to read the evidence

Well-designed preclinical study with multiple measures and both sexes, but mouse model has limited clinical translatability.

When this study was published

Published 2026, addressing the understudied female response to CBD in addiction.

The bigger picture

The dramatic sex difference — CBD affecting cocaine behavior in females but not males — adds to growing evidence that addiction and its treatments work differently by sex. One-size-fits-all approaches to addiction treatment may be missing opportunities.

Questions still open

Would intermediate CBD doses show better effects? Why do males and females respond so differently? Could the serotonin receptor mechanism be targeted more specifically? Would human clinical trials show similar sex-dependent effects?

Common questions

Could CBD help treat cocaine addiction?

In female mice, low-dose CBD reduced cocaine self-administration by altering brain reward pathways. But the effects were dose-dependent and sex-specific — males didn't respond, and higher CBD doses had paradoxical effects.

Why does CBD affect males and females differently for addiction?

The study found CBD altered serotonin receptor expression in the prefrontal cortex specifically in females, suggesting sex-specific neurochemical pathways. Women progress faster to cocaine addiction in real life, so sex-specific treatments could be important.

Read the original research

Sex and dose-dependent effects of cannabidiol on cocaine consumption in mice.

Translational psychiatry, 16(1)

View on PubMed ↗Publisher’s paper ↗

Citation

Llerena, Veronika; Tic, Iva; Llach-Folcrà, Maria; Valverde, Olga; Medrano, Mireia. (2026). Sex and dose-dependent effects of cannabidiol on cocaine consumption in mice.. Translational psychiatry, 16(1). https://doi.org/10.1038/s41398-026-03880-3