1. White crystal, odorless, taste slightly bitter and numb. “It is highly soluble in water, ethanol and organic solvents, but not in diethyl ether.” The aqueous solution does not decompose in the case of acid and alkali, and it rarely deteriorates after repeated autoclaving.Lidocaine hydrochloride has the characteristics of strong penetration, strong dispersion and rapid onset of action. The anesthetic efficacy of lidocaine hydrochloride is 2 times that of procaine, and the toxicity is 1. The anesthetic effect occurs within 5 minutes of administration and lasts for 1 to 1.5 hours, 50% longer than procaine. After absorption can inhibit the central nervous system, and can inhibit ventricular automaticity, shorten the Chemicalbook short refractory period, can be used to control ventricular tachycardia, treatment of ventricular premature beat, ventricular tachycardia and ventricular fibrillation and other arrhythmia symptoms. “It is effective in the treatment of cardiac disorders or cardiac glycosids-induced arrhythmias, but not in the treatment of supraventricular tachycardia.” This product has rapid action, short duration, and is ineffective orally and is often administered as an intravenous injection.