Valproic acid changes some depression-like behaviors in rats, with mixed test results
An animal-study review found less immobility and greater sucrose preference with valproic acid, while a recognition-memory test showed no statistically significant effect.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The review found antidepressant-like behavioral changes in rat models exposed to stress, including less immobility in a swimming test and greater preference for sucrose water. A test of recognizing a new object showed no statistically significant benefit. These animal results do not establish that valproic acid treats depression in people.
The authors report differences between experiments and possible publication bias. The abstract does not supply durations for the pooled swimming-test comparison, and behavioral outcomes in rats cannot establish human clinical effects.
What researchers found
Immobility in the forced swimming test
Valproic acid versus untreated animals; 95% CI -1.66 to -0.21; p = 0.012. Treatment durations for this pooled standardized mean difference were not reported.
Reading the main measure
The negative standardized mean difference indicates lower immobility with valproic acid relative to untreated animals. It summarizes a behavioral test across experiments; it is not a percentage reduction in depression or a measure of human recovery.
Results differed by test
Movement scores and sucrose preference also increased in the treated animals. Novel-object recognition did not show a significant effect, so the findings were not uniformly positive across the different behaviors examined in the review.
The original publication
Valproic acid effects on stress-induced depression-like behavior in rodent models: a systematic review and meta-analysis.
Goudarzi M, Mohammadi L, Sharifi M et al.
Stress · 2026
- PubMed ID
- 41826267
- Record checked
AI-assisted research and writing. This explains one selected publication; it is not a complete review of everything known. Our approach.
One more question, understood.
Keep track of the research you’ve explored.