代谢
在给予的剂量中,不到1%以原形在尿液中回收,[L10863]这表明莱博雷克斯兰特(lemborexant)可能被广泛代谢——这一点已经在大鼠和猴模型中得到证实,[A189003]但其在人体内的代谢尚未完全表征。处方信息表明,它主要由CYP3A4代谢,CYP3A5也有较小的贡献。主要循环代谢物是莱博雷克斯兰特的M10代谢物,它具有药理活性,并且与母药一样,与食欲素受体的亲和力相似。M10代谢物有可能诱导CYP3A和CYP2B6酶,轻微抑制CYP3A酶,并且是P-糖蛋白转运体的底物。[L10863]
Given that less than 1% of an administered dose is recovered unchanged in the urine,[L10863] it is likely that lemborexant is extensively metabolized - this has been confirmed in rat and monkey models,[A189003] but its metabolism in humans has not been fully characterized. Prescribing information states that it is predominantly metabolized by CYP3A4, with a smaller contribution by CYP3A5. The major circulating metabolite is lemborexant's M10 metabolite, which is pharmacologically active and binds to orexin receptors with a similar affinity to the parent drug. The M10 metabolite has the potential to induce CYP3A and CYP2B6 enzymes, weakly inhibit CYP3A enzymes, and is a substrate of P-gp transporters.[L10863]
来源:DrugBank