The correct method of nasal gavage is usually to put the patient in a seated or elevated position, brew the medication, then inject the brewed medication into the patient’s nasogastric tube with a 50 ml syringe, and then inject about 20 ml of warm saline into the patient’s nasogastric tube, the purpose of which is to facilitate the complete entry of the medication into the gastrointestinal tract. The nasogastric tube needs to be clamped shut for almost half an hour after the nasogastric administration in order to prevent reflux of the medication. After nasal feeding, the patient needs to maintain a sitting position for almost an hour to facilitate the digestion and absorption of the medication. Nasal feeding is usually used for patients who cannot swallow or cannot eat through the mouth. Nasal drug delivery is usually done directly to the patient’s stomach or duodenum through a special syringe. This facilitates the delivery of food or medication to the gastrointestinal tract for patients who cannot swallow directly, without going through the mouth, to ensure the body’s basic medication and nutritional needs.