Dizziness and nausea when taking cephalosporin may be an allergic reaction caused by cephalosporin, which should be stopped promptly and anti-allergic treatment should be given if necessary. Oral cetirizine, paracetamol, and in severe cases, intramuscular injection of benadryl and dexamethasone can be used for treatment. The common allergic reaction to cephalosporin antibiotics is rash, which may cause anaphylaxis in severe cases, and also dizziness, nausea and vomiting. Some patients may experience chest tightness, shortness of breath, abdominal distension, abdominal pain and other discomforts. The commonly used cephalosporin antibiotics in clinical practice mainly include ceftriaxone sodium, cefoperazone sulbactam and ceftazidime, etc. Cephalosporin is a broad-spectrum antibiotic, which is more commonly used clinically, mainly for lung infections and urinary tract infections. It can also be applied if there is frontal sinusitis, while tinidazole should be added for treatment. It can also be used for infectious diseases of the central nervous system, and is generally used mainly for bacterial meningitis.