Beijing Shuguang Pharm Co., Ltd.

Class Ic antiarrhythmic drugs, reduce systolic depolarization, prolong conduction, action potential duration and effective refractory period, increase threshold potential, reduce spontaneous myocardial excitability, reduce myocardial irritability, prolong the effective refractory period of atria and atrioventricular nodes, have membrane stabilizing and competitive β-blocking effects, weak calcium antagonism, mild myocardial inhibition, lower blood pressure and slow heart rate, relax coronary artery and bronchial smooth muscle, local anesthetic effect, long-term high-dose use may cause renal dysfunction and hepatic fatty degeneration

This product belongs to Class Ic antiarrhythmic drugs, which can reduce the depolarization effect during contraction, prolong conduction, action potential duration and effective refractory period, increase the threshold potential of myocardial cells, and reduce spontaneous excitability of the myocardium; it acts on the atria, ventricles and excitation conduction, reduces myocardial irritability, and prolongs the effective refractory period of the atria and atrioventricular node; it has membrane stabilizing effects and competitive β-blocking effects, weak calcium antagonism and myocardial inhibition effects; it also has mild antihypertensive and heart rate slowing effects, and can relax coronary artery and bronchial smooth muscles, and also has a local anesthetic effect similar to procaine.