Cefotaxime injection is used to treat certain infections caused by bacteria including pneumonia and other lower respiratory tract (lung) infections; gonorrhea (a sexually transmitted disease); meningitis (infection of the membranes that surround the brain and spinal cord) and other brain and spinal cord infections; and abdominal (stomach area), female reproductive organs, skin, blood, bone, joint, and urinary tract infections. Cefotaxime injection may also be used before surgery, and during and after a cesarean section, in order to prevent the patient from getting an infection. Cefotaxime injection is in a class of medications called cephalosporin antibiotics. It works by killing bacteria.