Amlodipine (CAS 88150-42-9) is a dihydropyridine-based small molecule that functions as a long-acting calcium channel blocker It selectively inhibits L-type calcium channels on vascular smooth muscle and cardiac myocytes thereby reducing intracellular calcium influx This action leads to vasodilation and decreased vascular resistance Amlodipine is widely utilized in biomedical research to investigate calcium signaling pathways vascular tone modulation and cardiovascular pharmacology Its mechanistic profile also makes it a reference compound in studies evaluating novel antihypertensive or vasodilatory agents