Barnidipine (hydrochloride) (CAS No 104757-53-1) is a calcium channel blocker used predominantly in cardiovascular research Originating from the dihydropyridine class of compounds it operates by inhibiting L-type calcium channels thereby reducing calcium influx into vascular smooth muscle cells and cardiac myocytes Its mechanism of action results in vasodilation and decreased vascular resistance contributing to its antihypertensive effects In vitro Barnidipine exhibits activity in the nanomolar to low micromolar range It is commonly applied in cell models such as vascular smooth muscle cells and cardiomyocytes as well as in animal studies to evaluate cardiovascular effects Barnidipine is also utilized in drug screening processes to assess potential therapeutic benefits and pharmacological properties Experimental concentrations typically depend on the specific research design