If the rhinitis is caused by a purulent bacterial infection that is sensitive to cefadroxil, it can be treated with cefadroxil, and cefadroxil is not a good treatment for other causes of rhinitis. Cefadroxil is a cephalosporin antibiotic, part of the purulent bacteria have a relatively strong killing effect, can be used to treat rhinitis caused by purulent bacterial infections that are sensitive to this drug. If the rhinitis is caused by bacterial or viral infections that are not sensitive to cefadroxil, taking cefadroxil does not achieve therapeutic effects. Allergic rhinitis is not helped by taking cefadroxil and should be treated with oral anti-allergy medication. Rhinitis caused by bacterial or viral infections, often manifested as nasal congestion, headache, runny nose, etc., patients should not take antibiotics on their own, should be in a clear cause of the disease under the guidance of the doctor to take medication and treatment.