Dacronin generally refers to Dacronin Hydrochloride Gummy Syrup, which is a product with occasional side effects such as mild headache and anxiety. Dacronin Hydrochloride Gum Paste is a local anesthetic. It is used for laryngeal anesthesia and lubrication during upper gastrointestinal endoscopy, as well as removing foam from the lumen for a clear view. During use, mild headache, anxiety, hot and cold sensations, numbness and other adverse reactions are occasionally seen due to differences in patient tolerance to the product. Care should be taken when using it, and it is contraindicated for those who are allergic to Dacronin Hydrochloride. Dosage should be reduced as appropriate in patients with acute illnesses and patients with severe damage to the mucous membrane of the digestive tract, children, the elderly and other groups. Pregnant women should be used with caution. If you are also taking other medications, you must ask your doctor when using Dacronin Hydrochloride Collodion, and you should not blindly use the medication on your own.