代谢
坎地沙坦酯是一种前药,在小肠壁中迅速且完全地通过酯水解形成活性药物坎地沙坦。坎地沙坦的消除主要是以原药形式通过尿液排出,以及通过胆汁途径随粪便排出。坎地沙坦的少量肝脏代谢(小于20%)通过细胞色素P450 2C9的O-脱乙基化生成一种无活性代谢物。坎地沙坦在噻唑环上发生N-葡萄糖苷酸化,由尿苷二磷酸葡萄糖苷转移酶1A3(UGT1A3)催化。还可能发生O-葡萄糖苷酸化。大约75%的坎地沙坦以原药形式通过尿液和粪便排出。
The prodrug candesartan cilexetil undergoes rapid and complete ester hydrolysis in the intestinal wall to form the active drug, candesartan. Elimination of candesartan is primarily as unchanged drug in the urine and, by the biliary route, in the feces. Minor hepatic metabolism of candesartan (<20%) occurs by O-deethylation via cytochrome P450 2C9 to form an inactive metabolite. Candesartan undergoes N-glucuronidation in the tetrazole ring by uridine diphosphate glucuronosyltransferase 1A3 (UGT1A3). O-glucuronidation may also occur. 75% of candesartan is excreted as unchanged drug in urine and feces.
来源:DrugBank