This product is suitable for infiltration anesthesia, epidural anesthesia, surface anesthesia (including mucosal anesthesia during thoracoscopy or abdominal surgery) and nerve block, can also be used for acute myocardial infarction ventricular premature beat and ventricular tachycardia, can also be used for digitalis poisoning, cardiac surgery and cardiac catheterization caused by ventricular arrhythmia. This product is usually ineffective for supraventricular arrhythmias.