Possible reactions of people after taking cephalosporin: First, pay attention to allergic reactions, because cephalosporin is a drug that can easily cause allergy. If patients have previous history of allergy, they should pay special attention to the appearance of allergic symptoms, including skin allergy, such as the appearance of rash and itching. There are also respiratory symptoms, such as chest tightness and difficulty in breathing are allergic reactions, which require timely application of anti-allergic drugs. Second, there may be gastrointestinal reactions, because all drugs metabolized by the digestive tract will have a certain impact on the digestive tract, some patients will have nausea, vomiting, diarrhea and other symptoms, it is recommended to stop or reduce the dosage according to the reaction after taking the drug. Third, long-term use of cephalosporin antibiotics may cause intestinal flora imbalance, the emergence of secondary infection, patients will have repeated diarrhea, then need to test the stool routine, stool fungal culture and the proportion of cocci in the stool, you can stop the drug or apply drugs to regulate the intestinal flora for treatment.