Lidocaine hydrochloride has the characteristics of strong penetration, strong dispersion, quick effect, anesthetic efficacy is twice that of procaine, and toxicity is 1. The anesthetic effect can appear 5 minutes after administration, and the anesthetic effect can last 1 to 1.5 hours, 50% longer than procaine. After absorption, Chemicalbook can inhibit the central nervous system, inhibit ventricular automaticity, shorten the refractory period, and can be used to control ventricular tachycardia and treat arrhythmia symptoms such as premature ventricular beat, ventricular tachycardia and ventricular fibrillation. It is effective for heart disease or arrhythmia caused by cardiac glycosides, but not effective for supraventricular tachycardia. This product acts quickly, has a short duration, is ineffective orally, and is often administered intravenously