The respiratory system of infants and young children is not yet mature, their cough reflex is poor, the airway lumen is narrow, the blood vessels are rich, the cilia movement is poor, and the sputum is not easily discharged, The cough is temporarily stopped, but the contraction and peristaltic function of the bronchial smooth muscle is inhibited and the sputum is not expelled smoothly, affecting respiratory function. For children with cough, cough medicines with expectorant and phlegm-transforming effects are suitable, and syrup is better than tablets. The syrup adheres to the mucous membrane of the pharynx after administration, reducing the stimulating effect on the mucous membrane and achieving the purpose of cough suppression in itself. According to the theory of Chinese medicine, cough is divided into hot cough, cold cough, windy cough and internal cough. It is mainly used to treat wind-heat coughs and coughs with phlegm, but should not be used for coughs caused by wind-cold, coughs with white sputum, and coughs that are heavy at night and light at day. Compound Loquat Paste: It has the effect of clearing the lung, relieving cough and resolving phlegm, and is suitable for wind-heat cough, dry throat and unpleasant cough. Fresh Bamboo Leach: It is cold in nature and has the effect of clearing heat and moistening the lung, resolving phlegm and relieving cough, and is suitable for dry cough and yellow phlegm with blood. It is not suitable for children with feverish cough and yellow sputum with blood. Pertussis Syrup: It is warm in nature and is suitable for coughs caused by windy colds, but should not be taken for coughs caused by windy fever. Cough syrup for cold and flu: also known as fenugreek syrup, it is mainly used to stop coughing, but also to dissolve phlegm and has a sedative effect. It is suitable for coughing with phlegm at night, affecting sleep and bronchitis caused by allergies.