White crystal, odorless, slightly bitter and numb. Very soluble in water, ethanol and organic solvents, but insoluble in ether. The aqueous solution does not decompose under the condition of acid and alkali, and rarely deteriorates after repeated high-pressure sterilization.

Lidocaine hydrochloride has the characteristics of strong penetration, strong dispersion and fast onset. The anesthetic efficiency is twice that of procaine, and the toxicity is 1. The anesthetic effect can appear 5 minutes after administration. The anesthetic effect can last for 1 ~ 1.5 hours, 50% longer than procaine. After absorption, it can inhibit the central nervous system, inhibit ventricular autonomy and shorten refractory period. It can be used to control ventricular tachycardia and treat arrhythmia symptoms such as ventricular premature beat, ventricular tachycardia and ventricular fibrillation. It is effective for heart diseases or arrhythmias caused by cardiac glycosides, but not for supraventricular tachycardia. This product has the advantages of fast action, short duration and no oral toxicity.