Platycodon is considered bitter and pungent in flavor and of a neutral thermal nature. It has influence on the lung meridian. Its primary functions are to promote the dispersing function of the lungs and to resolve phlegm.
Major indications for Platycodon are coughs with profuse sputum of sputum that is difficult to expectorate, fullness and distention in the chest, sore throat, and horse voice.
Combinations include Platycodon being used with Apricot Seed, Perilla, and Tangerine Peel for wind-cold cough. With Mulberry Leaf, Apricot Seed, and Trichosanthes for wind-heat cough. With Scrophularia, Licorice, and Burdock Seed for sore throat and hoarseness, or for toxic heat in the lungs manifested as a cough with blood or pus, yellow and offensive smelling sputum and chest pain. With Houttuynia, Benincasa Seed, and Trchosanthes.
In The Way of Herbs Michael Tierra lists Platycodon as having a slightly warm energy. He states that it is useful for treating asthma, cough, sore throat, lung, bronchial congestion, pneumonia, and clear infected mucus.
The dosage is 3 – 10 grams in decoction.