Platycodon grandiflorum can be used in decoction or in pills or powder. Platycodon grandiflorum is bitter, pungent and neutral in nature; it belongs to the lung meridian. It has the efficacy of promoting the lung, expelling phlegm, inducing diaphoresis and draining pus. Clinically, it is mainly used for the treatment of cough and phlegm, chest tightness, sore throat, loss of voice, lung carbuncle spitting pus. Adverse reactions: Platycodon grandiflorum has a certain degree of irritation to the gastric mucosa, and excessive dosage can cause mild nausea and even vomiting. Gastric and duodenal ulcer patients should be cautious, and the dose should not be too large. This product is ascending and dispersing in nature, and should not be used in cases of upward reversal of qi, vomiting, choking, coughing, dizziness, and coughing up blood due to yin deficiency (deficiency of yin and essence in the body, resulting in hyperactive fire). If the patient has any discomfort, please go to the regular medical institutions; if you need to use Platycodon grandiflorum, must be used under the guidance of a professional doctor.