4.1 Review

Pharmacokinetic pharmacodynamic modeling of analgesics and sedatives in children

Journal

PEDIATRIC ANESTHESIA
Volume 33, Issue 10, Pages 781-792

Publisher

WILEY
DOI: 10.1111/pan.14712

Keywords

children; pain; pharmacodynamic; pharmacokinetic; sedation

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Pharmacokinetic pharmacodynamic modeling is a valuable tool for understanding the relationship between drug concentration and effect, particularly in pediatric patients. It helps to identify variability among patients and adjust dosing for optimal pain management. Consideration of size and maturation is crucial in accurate modeling and determining optimal dose in different age groups. However, assessing analgesic and sedative effects in children can be challenging due to the multidimensional nature of pain and limitations of measurement tools.
Pharmacokinetic pharmacodynamic modeling is an important tool which uses statistical methodology to provide a better understanding of the relationship between concentration and effect of drugs such as analgesics and sedatives. Pharmacokinetic pharmacodynamic models also describe between-subject variability that allows identification of subgroups and dose adjustment for optimal pain management in individual patients. This approach is particularly useful in the pediatric population, where most drugs have received limited evaluation and dosing is extrapolated from adult practice. In children, the covariates of weight and age are used to describe size- and maturation-related changes in pharmacokinetics. It is important to consider both size and maturation in order to develop an accurate model and determine the optimal dose for different age groups. An adequate assessment of analgesic and sedative effect using pain scales or brain activity measures is essential to build reliable pharmacokinetic pharmacodynamic models. This is often challenging in children due to the multidimensional nature of pain and the limited sensitivity and specificity of some measurement tools. This review provides a summary of the pharmacokinetic and pharmacodynamic methodology used to describe the dose-concentration-effect relationship of analgesics and sedation in children, with a focus on the different pharmacodynamic endpoints and the challenges of pharmacodynamic modeling.

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