title: Pharmacokinetic interaction of zonisamide in rats. Effect of zonisamide on other antiepileptics.
abstract: The effects of zonisamide (ZNS) on the pharmacokinetics of phenobarbital (PB), valproic acid (VPA), carbamazepine (CBZ) and phenytoin (PHT) were investigated in rats. Additionally, the influence of ZNS on the serum protein binding, erythrocyte distribution and metabolism of these antiepileptics was studied in vitro. The t 1/2 and AUC values of PB were significantly increased by ZNS coadministration, and a significant decrease in the Vd/F value of PHT was observed after multiple dosing of ZNS. By contrast, ZNS showed no significant effect on VPA and CBZ kinetics. No significant effect of ZNS was observed in the serum protein binding, erythrocyte distribution or metabolism of other antiepileptics. These results suggest that ZNS has little effect on the pharmacokinetic behaviors of other antiepileptic drugs.
authors.affiliation: Department of Pharmaceutical Services, Hiroshima University Hospital, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kimura
authors.forename: N
authors.initials: N
authors.lastname: Tanaka
authors.forename: Y
authors.initials: Y
authors.lastname: Kimura
authors.forename: K
authors.initials: K
authors.lastname: Miyake
authors.forename: T
authors.initials: T
authors.lastname: Kitaura
authors.forename: H
authors.initials: H
authors.lastname: Fukuchi
mesh_terms: D000818:Animals; D000927:Anticonvulsants / Q000097:blood / Q000493:pharmacokinetics* / Q000494:pharmacology; D001798:Blood Proteins / Q000378:metabolism; D002220:Carbamazepine / Q000097:blood / Q000493:pharmacokinetics; D004347:Drug Interactions; D004912:Erythrocytes / Q000187:drug effects / Q000378:metabolism; D066298:In Vitro Techniques; D007555:Isoxazoles / Q000494:pharmacology*; D008297:Male; D010634:Phenobarbital / Q000097:blood / Q000493:pharmacokinetics; D010672:Phenytoin / Q000097:blood / Q000493:pharmacokinetics; D011485:Protein Binding / Q000187:drug effects; D051381:Rats; D017208:Rats, Wistar; D014635:Valproic Acid / Q000097:blood / Q000493:pharmacokinetics; D000078305:Zonisamide
chemical_list: D000927:Anticonvulsants; D001798:Blood Proteins; D007555:Isoxazoles; D002220:Carbamazepine; D000078305:Zonisamide; D014635:Valproic Acid; D010672:Phenytoin; D010634:Phenobarbital