代谢
大多数(98至99%)的口服剂量通过结肠细菌和该环境中低存的氧化还原势迅速转化为两分子5-氨基水杨酸(5-ASA)。奥沙拉嗪在结肠中转化为美沙拉秦的过程与柳氮磺吡啶相似,后者转化为磺胺吡啶和美沙拉秦。大约0.1%的奥沙拉嗪口服剂量在肝脏中代谢为奥沙拉嗪-O-硫酸盐(奥沙拉嗪-S)。
Most (98 to 99%) of an oral dose is rapidly converted into two molecules of 5-aminosalicylic acid (5-ASA) by colonic bacteria and the low prevailing redox potential found in this environment. The conversion of olsalazine to mesalamine in the colon is similar to that of sulfasalazine, which is converted into sulfapyridine and mesalamine. Approximately 0.1% of an oral dose of olsalazine is metabolized in the liver to olsalazine-O-sulfate (olsalazine-S)
来源:DrugBank