A ceftazidime injection is prescribed for treating certain bacterial infections. This injectable drug belongs to a class of medications known as cephalosporin antibiotics. The medication kills bacteria that causes infections, such as pneumonia, meningitis, brain and spinal cord infections, skin infections and urinary tract infections. It will not treat colds, flu, or other viral infections. If you use antibiotics such as this when you do not need them, you might get an infection that is resistant to antibiotic treatment.