代谢
首过代谢占到了服用托芬那酸剂量的20%。尿液代谢物研究表明,已经鉴定出五种代谢物,其中三种是单羟基化代谢物,一种是单羟基化和羟基化代谢物,还有一种代谢物呈现氧化甲基团,形成羧基团。其中两个羟基化代谢物是N-(2-羟甲基-3-氯苯基)-邻氨基苯甲酸和N-(2-羟甲基-3-氯-4-羟基苯基)-邻氨基苯甲酸。
The first pass metabolism accounts for 20% of the administered dose of tolfenamic acid. Urine metabolite studies have demonstrated the identification of five metabolites from which three of them are monohydroxylated, one is monohydroxylated and hydroxylated and one last metabolite that presented and oxidized methyl group to form a carboxyl group. Two of these hydroxylated metabolites are N-(2-hydroxymethyl-3-chlorophenyl)-anthranilic acid and N-(2-hydroxymethyl-3-chloro-4-hydroxyphenyl)-anthranilic acid.
来源:DrugBank