Phlegm and Cough is a compound preparation, which mainly has the effect of relieving cough and resolving phlegm, ventilating and smooth the air. In clinical practice, it is used to treat cough with excessive phlegm caused by bronchitis, pharyngitis and wheezing bronchitis. The main ingredients contained in the drug include Radix Platycodon grandiflorus, Radix et Rhizoma Polygoni, Radix Bupleurum, Radix Pentaphyllum, Radix Glycyrrhiza Uralensis, and caffeine. In the process of taking the drug, do not eat spicy, stimulating, cold, greasy food, and need to be used with caution for diabetic patients and patients with a cold spleen and stomach, prone to diarrhea. And when taking the drug, pay attention to the side effects of caffeine, which may appear to have a state of euphoria and even lead to insomnia.