代谢
格列美脲据报道会经历肝脏代谢。无论是静脉注射还是口服给药后,格列美脲在CYP2C9酶的介导下经历氧化生物转化,形成主要代谢物环己基羟甲基衍生物(M1),该代谢物具有药理活性。M1可以进一步被一个或几个细胞质酶代谢为无活性的羧基衍生物(M2)。在动物模型中,M1保持了其原药约三分之一的药理活性,半衰期为3-6小时。然而,M1的降糖效果在临床上是否显著尚不清楚。
Glimepiride is reported to undergo hepatic metabolism. Following either an intravenous or oral dose, glimepiride undergoes oxidative biotransformation mediated by CYP2C9 enzyme to form a major metabolite, cyclohexyl hydroxymethyl derivative (M1), that is pharmacologically active. M1 can be further metabolized to the inactive metabolite carboxyl derivative (M2) by one or several cytosolic enzymes. M1 retained approximately one third of the pharmacologic activity of its parent in an animal model, with a half-life of 3-6 hours. However, whether the glucose-lowering effect of M1 is clinically significant is not clear.
来源:DrugBank