Amlodipine is a dihydropyridine calcium channel blocker that inhibits the transmembrane influx of calcium ions into vascular smooth muscle and cardiac muscle. Valsartan blocks the vasoconstrictor and aldosterone-secreting effects of Angiotensin II by selectively blocking the binding of Angiotensin II to the AT1 receptor in many tissues, such as vascular smooth muscle and the adrenal gland. Its action is therefore independent of the pathways for Angiotensin II synthesis. Amlodipine and Valsartan have been shown to be effective in lowering blood pressure. Both Amlodipine and Valsartan lower blood pressure by reducing peripheral resistance, but calcium influx blockade and reduction of Angiotensin II vasoconstriction are complementary mechanisms.
AV 5/80 Tablet
Amlodipine is an effective treatment of hypertension in once daily doses of 2.5 mg-10 mg while Valsartan is effective in doses of 80 mg-320 mg. In clinical trials with Amlodipine and Valsartan combination using Amlodipine doses of 5 mg-10 mg and Valsartan doses of 160 mg-320 mg, the antihypertensive effects increased with increasing doses.