Cardicil 5 mg Tablet contains Cilnidipine, a dual-action calcium channel blocker developed by Radiant Pharmaceuticals Ltd. in Bangladesh. It is primarily used to manage hypertension (high blood pressure), particularly in patients with chronic kidney disease, diabetes, or albuminuria. Cilnidipine works by inhibiting calcium influx through both L-type and N-type voltage-gated calcium channels. This dual mechanism results in vasodilation of blood vessels and suppression of sympathetic nerve activity, effectively lowering blood pressure and reducing the risk of cardiovascular complications.