Cephalosporin is a commonly used class of antibiotics, mainly for bacterial infections. Commonly, there are respiratory infections, urinary tract infections, gastrointestinal tract and skin infections and so on. How to use this drug, it is best to follow the doctor’s advice, do not take this antibiotic orally by yourself. Because there is no clear bacterial infection, oral antibiotics are not only not good for the body, but they can affect the body’s immunity and even cause allergic reactions. This is because antibiotics themselves can have gastrointestinal reactions. If you take this antibiotic before meals, it may cause dizziness, nausea, vomiting, and even abdominal pain, diarrhea, and other gastrointestinal reactions. Therefore it is better to take antibiotics after meals, and after half an hour after meals.