A non-addictive antitussive drug with both central and peripheral antitussive effects. It mainly acts on the cough center, selectively inhibiting the corpus reticularis in the brainstem, including the cough center in the medulla oblongata. Its clinical antitussive effect is similar to or slightly inferior to that of codeine, but it does not have the intestinal peristalsis inhibitory effect of codeine. It also has an expectorant effect, which can change the polysaccharide fiber properties of acidic glycoproteins in sputum, causing the mucopolysaccharide fibers to swell and break, and has a strong mucolytic effect. It also has sedative, local anesthetic, antihistamine, and anticholinergic effects, and can relieve bronchial smooth muscle spasms caused by histamine, acetylcholine, and 5-hydroxytryptamine.

This product is a dihydropyridine calcium channel blocker. This product inhibits the transmembrane calcium ion influx of vascular smooth muscle and myocardium, but its vascular action is mainly vascular, so its vascular selectivity is relatively strong. This product causes the expansion of systemic blood vessels such as coronary arteries and renal arterioles, producing a hypotensive effect.

This product is a dihydropyridine calcium channel blocker. This product inhibits the transmembrane calcium ion influx of vascular smooth muscle and myocardium, but its vascular action is mainly vascular, so its vascular selectivity is relatively strong. This product causes the expansion of systemic blood vessels such as coronary arteries and renal arterioles, producing a hypotensive effect.

This product is a dihydropyridine calcium channel blocker that inhibits transmembrane calcium influx in vascular smooth muscle and myocardium, but mainly acts on blood vessels, so it has strong vascular selectivity. It causes dilation of systemic blood vessels such as coronary arteries and renal arterioles, producing a hypotensive effect.

This product is a dihydropyridine calcium channel blocker that inhibits the transmembrane calcium ion influx of vascular smooth muscle and myocardium. It mainly acts on blood vessels, causing the dilation of systemic blood vessels such as coronary arteries and renal arterioles, producing a hypotensive effect.