Dacronin and lidocaine are both used as local anesthetics, and there are individual differences in their effectiveness, so there is no such thing as which one is the most effective. Dacronin is primarily indicated for laryngeal anesthesia and lubrication during upper gastrointestinal endoscopy, as well as also relieving mild sore throat and inflammation of the gums. As a local anesthetic, patients may experience adverse reactions such as skin lesions and edema. In case of overdose of Dacronin, adverse reactions such as dizziness, blurred vision, drowsiness and in severe cases even respiratory arrest may occur. Lidocaine belongs to the amide class of drugs and is mainly indicated for the relief of postherpetic neuralgia and other conditions. Adverse reactions such as local itching, peeling, edema, drowsiness and convulsions may occur with the use of lidocaine. In addition, allergy to the components of the drug and amide local anesthetic drugs should be used with caution, otherwise bronchospasm, dermatitis, dyspnea and other allergic reactions may occur, and in severe cases, even shock. The direction of treatment of the two drugs are not the same, there is no use of which is the best effect. It is recommended that the patient according to their own situation, follow the doctor’s instructions to standardize the use of drugs.