Dacronin has the effect of blocking the conduction of nerve impulses and stimuli, inhibiting pain and touch, stopping itching and sterilization. Dacronin for aryl ketone local anesthetic drugs, the product has a rapid onset of action, long-lasting effect; mostly used for surface anesthesia of the skin or mucous membranes or pain and itching, but also for the treatment of burns, abrasions, insect bites, or laryngoscopy, tracheoscopy, tracheoscopy before the preparation. Dacronin can not be injected for anesthesia, can only be used externally (such as application, gargle or spray, etc.); allergic to the product is prohibited, pregnant women and lactating women should be cautious, such as in the process of the use of headache, anxiety or numbness and other symptoms must be discontinued in time and inform the physician. It is recommended to use the drug under the guidance of a doctor to avoid adverse reactions and other accidents.