Platycodon grandiflorum is mainly used in the treatment of sore throat, hoarseness, cough with profuse phlegm, chest tightness, sputum, lung carbuncle and spitting pus, etc. It has the effect of expelling phlegm, clearing the throat and relieving pus. Platycodon grandiflorum has the efficacy of expelling phlegm, declaring the lungs, inducing diaphoresis and draining pus. Platycodon grandiflorum is the dried root of Platycodon grandiflorum, which belongs to the medicine of clearing heat and phlegm in the medicine of relieving cough and resolving phlegm and asthma. Platycodon grandiflorum is flat in nature, bitter and pungent in flavor, entering the lung meridian, with a decoction dosage of 3~10g. Platycodon grandiflorum is long used in the treatment of sore throat and hoarseness, cough and phlegm, chest tightness, sputum, lung carbuncle, spitting pus and so on. Platycodon grandiflorum is ascending and dispersing in nature, which is not suitable for vertigo, choking, coughing, Qi upturning, vomiting and coughing up blood due to yin deficiency (deficiency of yin and essence in the body, and hyperactive deficiency fire). Excessive dosage may cause nausea and vomiting. Adverse effects of Platycodon grandiflorum are not known. If medication is needed, please use it under the guidance of a professional Chinese medicine practitioner.