Valproic Acid Pharmacokinetics and Drug Interactions
Summary
Valproic acid is a widely prescribed broad-spectrum anticonvulsant and mood stabiliser whose clinical efficacy is governed by complex pharmacokinetic processes and a narrow therapeutic index. After oral administration, valproic acid is rapidly absorbed and undergoes extensive hepatic metabolism via glucuronidation, β-oxidation in mitochondria and cytochrome P450–mediated pathways. Non-linear protein binding and enterohepatic recirculation further complicate dose–concentration relationships, making therapeutic drug monitoring essential. Valproic acid interacts with numerous co-administered agents: enzyme inducers can reduce its plasma levels, while inhibitors may provoke toxicity. Of particular importance are carbapenem antibiotics, which disrupt intestinal reabsorption and accelerate clearance, leading to precipitous falls in serum valproate concentrations and risk of seizure recurrence. In overdose or poisoning scenarios, extracorporeal removal techniques such as haemodialysis and continuous venovenous haemodiafiltration have been employed, often in conjunction with L-carnitine, to mitigate central nervous system depression and metabolic derangements. Understanding these pharmacokinetic principles and interaction mechanisms underpins safe prescribing, informed dose adjustments and the development of rapid analytical methods for clinical monitoring.
Research from Nature Portfolio
No recent Nature Portfolio content available.
Valproic Acid Pharmacokinetics and Drug Interactions publication trend
The graph below shows the total number of articles in valproic acid pharmacokinetics and drug interactions across all publications each year (not limited to Nature Index journals).
Technical terms
Pharmacokinetics: The study of drug absorption, distribution, metabolism and excretion over time.
Enterohepatic recirculation: The process by which a drug excreted in bile is reabsorbed from the intestine, extending its systemic presence.
Non-linear protein binding: A phenomenon in which changes in drug concentration lead to disproportionate alterations in protein binding and free drug levels.
Therapeutic drug monitoring (TDM): The clinical practice of measuring specific drug concentrations to optimise dosing and minimise toxicity.
Carbapenems: A class of broad-spectrum β-lactam antibiotics known to interact with valproic acid by inhibiting its enterohepatic reabsorption.
References
- Carbapenems as Antidotes for the Management of Acute Valproic Acid Poisoning. Pharmaceuticals (2024).
- Clinical impact of carbapenems in critically ill patients with valproic acid therapy: A propensity-matched analysis. Frontiers in Neurology (2023).
- A simple and rapid HPLC-UV method for the determination of valproic acid in human plasma using microwave-assisted derivatization with phenylhydrazine hydrochloride. Heliyon (2024).
- Simultaneous, Dual Continuous Venovenous Haemodiafiltration as Salvage Therapy for Severe Sodium Valproate Intoxication. Case Reports in Critical Care (2024).
About these summaries
This Nature Research Intelligence Topic summary is created with the cited references and a large language model. We take care to ground generated text with facts, and have systems in place to gain human feedback on the overall quality of the process in line with our AI principles. We strive to create accurate and useful summaries for people unfamiliar with the research topic and that supports this goal. These pages are a beta release and will be updated as we learn how best to help people gain value from a research topic summary.
Turn complex research questions into confident strategic decisions
When you're under pressure to set direction, justify investment, or understand your competitive position, you need more than raw data — you need trusted insights you can act on.
Benchmark your performance against global peers using robust, methodologically sound analysis.
Combine quantitative metrics with qualitative expert insight to uncover strengths, gaps and emerging opportunities.
Gain tailored, decision-ready recommendations aligned to your strategic priorities.
Talk to us to learn more about our data dashboards and bespoke strategy reports.
Grow research skills, confidence and careers with training built for every stage of the research lifecycle.
Developed with Nature Portfolio journal Editors and internationally renowned experts. Discover three ways to learn:
Self-paced, online courses in convenient bite-sized units, covering key skills across scientific writing, publishing, grant writing, data analysis, and more.
Expert trainer-led workshops with hands-on exercises and real-time feedback across core research skills, delivered via interactive group sessions.
Editor-led workshops combining core principles in writing and publishing, personalised 1:1 feedback from Nature Portfolio Editors and hands-on exercises.
Explore course catalogues and workshop agendas, enquire about the options or request institutional pricing.