NCIt definition : The maleate salt of amlodipine, a synthetic phenylpyridine vasodilator with antihypertensive
and antianginal effects. Amlodipine inhibits the influx of extracellular calcium ions
into myocardial and peripheral vascular smooth muscle cells, thereby preventing vascular
and myocardial contraction. Furthermore, decreased myocardial contractility and dilation
of the main coronary and systemic arteries lead to increased blood flow and oxygen
delivery to the myocardial tissue and decreases total peripheral resistance. This
agent may also modulate multi-drug resistance (MDR) activity through inhibition of
the p-glycoprotein efflux pump.;