Silva, RuiColom Codina, HelenaBicker, JoanaAlmeida, AnabelaSilva, AnaSales, FranciscoSantana, IsabelFalcão, AmílcarFortuna, Ana2023-07-252023-07-252023-06-101999-4923https://hdl.handle.net/2445/201145Perampanel is a promising antiepileptic drug (AED) for refractory epilepsy treatment due to its innovative mechanism of action. This study aimed to develop a population pharmacokinetic (PopPK) model to be further used in initial dose optimization of perampanel in patients diagnosed with refractory epilepsy. A total of seventy-two plasma concentrations of perampanel obtained from forty-four patients were analyzed through a population pharmacokinetic approach by means of nonlinear mixed effects modeling (NONMEM). A one-compartment model with first-order elimination best described the pharmacokinetic profiles of perampanel. Interpatient variability (IPV) was entered on clearance (CL), while the residual error (RE) was modeled as proportional. The presence of enzyme-inducing AEDs (EIAEDs) and body mass index (BMI) were found as significant covariates for CL and volume of distribution (V), respectively. The mean (relative standard error) estimates for CL and V of the final model were 0.419 L/h (5.56%) and 29.50 (6.41%), respectively. IPV was 30.84% and the proportional RE was 6.44%. Internal validation demonstrated an acceptable predictive performance of the final model. A reliable population pharmacokinetic model was successfully developed, and it is the first enrolling real-life adults diagnosed with refractory epilepsy.16 p.application/pdfengcc by (c) Silva, Rui et al, 2023http://creativecommons.org/licenses/by/3.0/es/EpilèpsiaFarmacologiaPortugalEpilepsyPharmacologyPortugalinfo:eu-repo/semantics/article2023-07-13info:eu-repo/semantics/openAccess37376153