In children with bronchitis and cough, antibacterial drugs may be considered if the infection is clearly bacterial, Mycoplasma pneumoniae, or Chlamydia pneumoniae virus. Generally mycoplasma pneumoniae or chlamydia infections can be treated with macrolide antibiotics, including erythromycin, azithromycin, and clarithromycin. For other pathogenic infections, antibiotics need to be adjusted after initial empirical treatment and should be selected according to the results of drug sensitivity tests. Cefaclor is ineffective against staphylococci and can be used if staphylococcal infection can be excluded, otherwise it should not be used. If there is phlegm, the principle of expectorant should be used, not simply to stop coughing. Acetylcysteine, aminoglycoside hydrochloride, bicuculline, guaifenesin, myrtle oil and herbal expectorants can be used. If the child also has allergies, first-generation antihistamines such as paracetamol can be used. If the child has symptoms of rhinitis, decongestants such as hydroxyzoline hydrochloride spray can be used, or a combination containing pseudoephedrine and first-generation antihistamines such as Myminepseudomine solution and Phenomethamine suspension can rapidly improve the three symptoms of nasal congestion, runny nose and postnasal drip.