Opc 8490 is a cardiotonic agent and a positive inotropic vasodilator that increases Ca current (ICa) in a dose-dependent and reversible manner and prolongs atrial action potential in a concentration-dependent manner.

Yangambin is a selective antagonist of the cardiovascular effects of platelet activating factor (PAF); it has hypotensive effect, which is probably due to a peripheral vasodilatation that involves, at least, the inhibition the Ca2+ influx through voltage-gated Ca2+ channels. Yangambin has central nervous system activity, it presents a depressant activity in the open field, forced swimming and pentobarbital sleeping time tests.

Mibefradil dihydrochloride is an blocker of calcium channel with moderate selectivity for T-type Ca2+ channels (T-type and L-type currents with IC50s of 2.7 μM and 18.6 μM, respectively). Mibefradil dihydrochloride inhibits reversibly the T- and L-type currents with IC50 values of 2.7 and 18.6 μM, respectively.