The difference between Dacronin Gum Paste and Bupivacaine Gum Paste is that Dacronin Gum Paste is used for laryngeal anesthesia and lubrication during upper gastrointestinal endoscopy, and Bupivacaine Gum Paste can be used for local lubrication and anesthesia for the urethra, esophagus, and vagina, in addition to the upper gastrointestinal tract. Dacronine Hydrochloride Gum Paste is a local anesthetic. It can be used for laryngeal anesthesia and lubrication during endoscopy of the upper gastrointestinal tract, and can also be used to remove foam from the lumen and make the view clear. Dacronin Hydrochloride Gum Paste can cause adverse reactions such as mild headache, anxiety, and numbness. It should not be used on broken skin. It is contraindicated for those who are allergic to the product and should be used with caution in allergic individuals. Bupivacaine Gum Paste is a local anesthetic. It can be used for lubrication and anesthesia for urethra, esophagus, vagina, anus, rectum and other intubation and microscopy, and also for local lubrication and anesthesia during surgery. Anaphylactic reactions have occasionally been seen with bupivacaine collodion. It is contraindicated in hyperallergic patients. It is contraindicated in cases of ruptured lumen and exposed blood vessels. This product is contraindicated in combination with procaine, soap, potassium iodide, borax, bicarbonate, carbonate, cyanide, citrate, phosphate and sulfate. If you need to use the drug, it is recommended to use the drug under the guidance of a doctor, not blindly self-medication to avoid adverse effects.