Sanziyangqin decoction, the name of traditional Chinese medicine prescription. As an expectorant, it has the effects of warming lung, resolving phlegm, lowering qi and promoting digestion. Indications: stagnation of phlegm and qi, food stagnation. Cough and asthma, excessive phlegm in the chest, loss of appetite, white and greasy tongue coating and slippery pulse. Clinically, it is often used to treat patients with intractable cough, chronic bronchitis, bronchial asthma, pulmonary heart disease and other phlegm stagnation.