Ceftazidime has good antimicrobial efficacy and acts in sepsis, skin infections and prevention of surgical infections. 1. Efficacy: ceftazidime is the third generation of cephalosporin antibiotics. It has high antibacterial activity against Enterobacteriaceae such as Escherichia coli, Pneumocystis, Haemophilus influenzae, Pseudomonas aeruginosa, etc. It also has good antibacterial activity against nitrate-negative bacilli and alkali-producing bacilli. Since the β-lactamases of most bacteria are highly stable, it still has antibacterial activity against multidrug-resistant strains of the above mentioned Gram-negative bacilli. Ceftazidime has moderate antibacterial activity against staphylococci, some antibacterial activity against anaerobic bacteria such as enterococci and streptococci, but poor antibacterial activity against fragile bacilli. 2.Role: ceftazidime is suitable for the treatment of infectious diseases caused by some gram-negative bacteria. Especially a variety of pseudomonas including Pseudomonas aeruginosa. Such as biliary tract infections, cystic fibrosis, infections in immunodeficient people. As well as gangrene, meningitis, peritonitis, pneumonia, sepsis, skin infections and prevention of surgical infections. It is recommended that when the body appears uncomfortable symptoms, should identify the cause of the disease, and under the guidance of the physician symptomatic treatment, not to self-medication.