Norfloxacin is a kind of quinolone drug, how many days you can take this issue can not be generalized, it needs to be analyzed according to the disease condition and the patient’s basic constitution. If for simple bacterial cold, the temperature rise is not very obvious, within 38 ℃, then take 3 days of norfloxacin can be. However, if the bacterial infection is obvious, accompanied by coughing, coughing sputum, upper respiratory tract symptoms, dry throat, sore throat, and purulent discharge, yellow discharge in the nasal cavity, if the body temperature is 38.5℃, or even about 39℃, norfloxacin can be taken for 5 days. If there is an obvious lung infection, such as a large area of pneumonia, then norfloxacin can take 7 days, or even more.