Zacopride

Zacopride is a selective agonist with the activity of enhancing the inward rectifier potassium current (IK1) in rabbit hearts. Zacopride also exhibits significant antiarrhythmic effects, inhibiting ventricular arrhythmias by increasing IK1 without affecting atrial arrhythmias. Zacopride can hyperpolarize the resting membrane potential and shorten the action potential duration (APD) in a concentration-dependent manner. Zacopride significantly reduced the incidence of compound-induced early afterdepolarizations (EADs) at 1 μmol/L.