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Development and Validation of Physiologically Based Pharmacokinetic Model of Levetiracetam to Predict Exposure and

Wenxin Shao1, Chaozhuang Shen1, Wenhui Wang1

  • 1Anhui Provincial Center for Drug Clinical Evaluation, Yijishan Hospital of Wannan Medical College, Wuhu 241001, Anhui, China.

Journal of Pharmaceutical Sciences
|April 6, 2023
PubMed

Insights

This study used a physiologically based pharmacokinetic (PBPK) model to predict levetiracetam (Lev) plasma exposure in children. The model provides dosing recommendations for pediatric epilepsy patients, ensuring safe and effective treatment.

Area of Science:

  • Pharmacokinetics
  • Pediatric Pharmacology
  • Computational Modeling

Background:

  • Levetiracetam (Lev) is a widely used antiepileptic drug in pediatric populations.
  • Understanding Lev's pharmacokinetic behavior in children is crucial for optimizing treatment.
  • Conducting pediatric drug trials presents ethical and practical challenges.

Purpose of the Study:

  • To develop and validate a physiologically based pharmacokinetic (PBPK) model for levetiracetam (Lev) in pediatric patients.
  • To predict plasma exposure of Lev across different pediatric age groups.
  • To provide evidence-based recommendations for levetiracetam dosage adjustments in children.

Main Methods:

  • A PBPK model for levetiracetam was initially developed in adults using PK-Sim® software.
  • The adult model was extrapolated to cover the entire pediatric age range.
  • The PBPK models were validated against existing clinical pharmacokinetic data.

Main Results:

  • The PBPK models demonstrated a good fit between predicted and observed levetiracetam plasma concentrations in both adults and pediatric populations.
  • Recommended levetiracetam dose multipliers relative to adults are 0.78 for neonates, 1.67 for infants, and 1.22 for children.
  • Plasma exposure of levetiracetam in adolescents was found to be similar to that in adults at equivalent doses.

Conclusions:

  • Successfully developed and validated PBPK models for levetiracetam in adult and pediatric populations.
  • The validated PBPK models serve as a valuable reference for rational levetiracetam administration in pediatric patients.
  • These findings support optimized dosing strategies for levetiracetam in children with epilepsy.

Keywords:
Dosing RegimenLevetiracetam (Lev)PK-Sim®PediatricPhysiologically Based Pharmacokinetic (PBPK) modeling

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