Duocard 10 mg is a brand name for cilnidipine, a calcium channel blocker used primarily to manage hypertension (high blood pressure). Unlike traditional calcium channel blockers, cilnidipine inhibits calcium influx through both L-type and N-type channels, leading to vasodilation and reduced sympathetic nerve activity. This dual action not only lowers blood pressure but also helps prevent reflex tachycardia, making it particularly beneficial for patients with chronic kidney disease, diabetes, or albuminuria .