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Diltiazem

地爾硫䓬
Mechanism of action:
Diltiazem 是一種鈣離子通道阻斷劑(calcium channel blocker),屬於苯並硫卓類(benzothiazepine)衍生物。Diltiazem 能阻斷 L 型鈣離子通道(L-type calcium channels),抑制鈣離子進入心肌與血管平滑肌細胞,減少動作電位平台期(plateau phase) 鈣離子流入。對於心臟能抑制竇房結去極化(depolarization),降低心跳速率;抑制房室結傳導,延長傳導時間,降低心肌收縮力。對於血管能鬆弛冠狀動脈與外週血管平滑肌,擴張血管、降低外週阻力並可能使血壓下降,進而降低心臟後負荷。
Reference(s):
1. Hermann P et al. (1983). Pharmacokinetics of diltiazem after intravenous and oral administration. Eur J Clin Pharmacol.
2. Rodriguez Padial L et al. (2016). Clinical experience with diltiazem in the treatment of cardiovascular diseases. Cardiol Ther.
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