If diarrhea is considered to be caused by intestinal infection, it can be treated with drugs such as norfloxacin, which belongs to the quinolone class of antibiotics and is effective against inflammation caused by intestinal infection. The use of this drug for 2 times a day, each time 0.3g, with 3-5 days to get better. It should be noted that this drug may cause allergic reactions, and it is important to first ask the patient if they have an allergy to quinolones before administering the drug. In addition, this type of drug can have an effect on bone development in children, so it is limited to adults over 18 years old. If the patient has heavy diarrhea, in addition to anti-infection with norfloxacin, anti-diarrheal drugs and drugs to aid digestion, such as montelukast plus multi-enzyme tablets, are also needed.