Cough suppressants are not recommended for children. The professional name of cough suppressants is pentoxifylline, which is a non-addictive central cough suppressant. The drug acts directly on the cough center to block the cough reflex and has a relaxing effect on the spasmodic bronchial smooth muscle, and can be used in cases of absent sputum and dry cough caused by specific respiratory diseases. The use of central cough suppressants is generally not recommended in children with coughs, as their use may interfere with the expulsion of sputum and cause blockage of sputum. In addition, the airway surface cilia function is relatively good in small children, and secreted sputum can reach the tracheal ridge through ciliary movements and then be expelled through the cough reflex. If central cough suppression is forced, phlegm will not be easily expelled and may aggravate the condition. When a child coughs, it is recommended to try to use cough suppressants to help expel the phlegm from the body, which will more easily relieve the cough state caused by the disease. However, for special cases of dry cough, such as whooping cough, when children cough very frequently and have bronchospasm, pentoxifylline can be used under medical supervision. However, attention should be paid to the dosage of the drug when using it. Adverse reactions mainly include mild headache, dizziness, drowsiness and other symptoms.