2023. Levetiracetam plus Oxcarbazepine Combination Treatment Downregulates Serum Multidrug Resistance Protein 1 Levels and Upregulates Neuropeptide Y Levels in Children with Epilepsy. Brazilian Journal of Pharmaceutical Sciences. 59, (May 2023), e21414. DOI:https://doi.org/10.1590/s2175-97902023e21414.