Magnex 1g Injection Magnex 1g is a combination antibiotic containing Cefoperazone (a third-generation cephalosporin) and Sulbactam (a beta-lactamase inhibitor). Cefoperazone acts by inhibiting bacterial cell wall synthesis during active multiplication, while Sulbactam irreversibly binds to and inactivates beta-lactamase enzymes produced by resistant bacteria, thereby restoring and extending Cefoperazone's antibacterial spectrum. It is indicated for the treatment of severe susceptible bacterial infections, including respiratory tract infections, urinary tract infections, intra-abdominal infections, septicemia, skin and soft tissue infections, bone and joint infections, and pelvic inflammatory disease.