不可逆拮抗剂是一种永久与受体结合的拮抗剂。它要么与活性位点形成共价键,要么结合得很牢固,以至于离解速率在相关时间跨度内可视为零。[1]这使受体永久失活,并很快被内化、回收。临床上会用到一些不可逆酶抑制剂药物,如阿司匹林奥美拉唑单胺氧化酶抑制剂[2]

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