代谢
多沙唑嗪的肝脏代谢产生无活性的O-去甲基化和C-羟基化代谢物。代谢通过多沙唑嗪喹唑啉核的O-去甲基化或其苯并二氧杂环部分的羟基化发生。参与多沙唑嗪代谢的酶包括CYP2C19、CYP2D6、CYP2C19和CYP3A4,后者是主要的代谢酶。多沙唑嗪本身被认为是其主要药理作用的主要负责人,然而,已经识别出一些活性代谢物,其药代动力学尚未得到充分表征。
Hepatic metabolism of doxazosin produces inactive O-demethylated and C-hydroxylated metabolites. Metabolism occurs via O-demethylation of the quinazoline nucleus of doxazosin or via hydroxylation of its benzodioxan portion. The enzymes involved in the metabolism of doxazosin include CYP2C19, CYP2D6, CYP2C19, and CYP3A4, which is the primary metabolizing enzyme. Doxazosin itself is considered to be mainly responsible for its pharmacological action, however, some active metabolites have been identified whose pharmacokinetics have not been adequately characterized.
来源:DrugBank