Summary: The purpose of this study is to develop population pharmacokinetic models for antiepileptic drugs in a pediatric population. The interest of these models is multiple: * describe the pharmacokinetics of these molecules in children and explain the inter-individual variability of concentrations through covariates such as weight, age, co-treatments, genetic polymorphisms and renal function; * estimate...

Summary: The study investigators are interested in learning more about how drugs, that are given to children by their health care provider, act in the bodies of children and young adults in hopes to find the most safe and effective dose for children. The primary objective of this study is to evaluate the PK of understudied drugs currently being administered to children per SOC as prescribed by their treati...