If the cough is caused by bacterial infection and white sputum, you can take cephalosporin antibacterial drugs for treatment. If it is caused by viral infection, cephalosporin antibacterial drugs have no therapeutic effect and antiviral drugs are needed, together with cough and sputum medicines. If the symptoms are more serious, it is best to go to the hospital for a checkup, which requires a chest X-ray and a blood test for routine blood tests. If the patient is not allergic to cephalosporin antibacterial drugs, he can take oral medication. For this type of drug allergy, erythromycin and azithromycin can be used.