Nausea and vomiting after drinking Chinese medicine on an empty stomach may be due to conditions such as unpleasant taste, stimulation of the stomach by the medicine, sensitive pharyngeal reflexes, and disease factors. 1. Discomfort of taste: Due to the poor taste of Chinese medicine, some people will experience nausea after drinking the medicine. 2. Stimulation of the stomach by medicines: some medicines such as Platycodon grandiflorum saponins have a direct stimulating effect on the mucous membranes of the oral cavity, pharynx and stomach, which may cause nausea and vomiting after taking them. 3. Sensitive pharyngeal reflex: part of the population’s pharyngeal reflex is more sensitive, eating a variety of drugs, including traditional Chinese medicine may have nausea, vomiting. 4. Disease factors: If the patients themselves have gastrointestinal diseases, such as gastroesophageal reflux disease, esophageal cancer, etc., they are prone to nausea and vomiting after eating or drinking Chinese medicines. If nausea and vomiting are caused by drinking Chinese medicine on an empty stomach, patients are advised to consult a specialist to find a reasonable solution.