Studies on pharmacokinetic mechanism of phenytoin resistance in refractory epilepsy.

Abstract excerpt

P-glycoprotein (P-gp) is a drug efflux pump in many organs, including the intestine and liver. Two single nucleotide polymorphisms (SNPs) of P-gp gene, 2677G>T and 3435C>T, were reported to influence function and expression of P-gp and have the controversial effects on drug disposition. Phenytoin is one substrate of P-gp. Persistent low phenytoin levels in plasma and P-gp overexpression in brain in several...

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