Whisker‐box plots show the median, quartiles and 95% prediction intervals for the steady‐state concentrations (Css) achieved in children receiving different doses and dosing regimens of antiepileptic drugs administered as monotherapy. Shaded area depicts the reference therapeutic range; numbers shown below the bars are percentages of the population with Css values outside the reference therapeutic range. See text for details on the population PK models, covariate effects and simulation procedures. CBZ= carbamazepine, CLBZ= clobazam, CLNZ= clonazepam, LMT= lamotrigine, LVT= levetiracetam, OXC= oxcarbazepine, PHB= phenobarbital, PHT= phenytoin, TPM= topiramate, VPA+ valproic acid, ZNS= zonisamide