top of page
< Back

Isosorbide mononitrate

單硝酸異山梨醇酯

Mechanism of action:

Isosorbide mononitrate 是一種有機硝酸鹽類血管擴張劑(organic nitrate vasodilator)。Isosorbide mononitrate 進入體內後,在血管平滑肌中經酵素轉化釋放一氧化氮(NO)。一氧化氮會刺激可溶性鳥苷酸環化酶(guanylate cyclase),使 cGMP 濃度上升。cGMP 促進肌球蛋白輕鏈去磷酸化,降低鈣離子對收縮蛋白的作用,導致血管平滑肌放鬆。隨後靜脈擴張,降低回心血量,降低心室壁張力與心肌耗氧量。

​Reference(s):

1. Munzel T et al. (2014). Organic nitrates: update on mechanisms underlying vasodilation, tolerance and endothelial dysfunction. Vascul Pharmacol. 


2. Abshagen UW et al. (1992). Pharmacokinetics of isosorbide mononitrate. Am J Cardiol.

bottom of page