Lido caine is a local anesthetic and antiarrhythmic drug. It is a derivative of but does not have the hallucinogenic and addictive components of.The hydrochloride of lido caine is a white crystalline powder, easily soluble in water, and its toxicity is comparable to that of procaine, but the local anesthetic effect is strong and lasting, and it has good surface penetration. It can be injected or used for surface anesthesia.Lido caine is a very good local anesthetic, which usually takes effect one to three minutes after application and lasts one to three hours.