Used to treat severe bacterial infections such as pneumonia, complicated intra-abdominal infections, and urinary tract infections. Effective against multidrug-resistant bacteria, including some strains of Pseudomonas aeruginosa and Enterobacteriaceae. Administered intravenously in hospital settings, especially when broad-spectrum antibiotic coverage is needed. Often reserved for cases where other antibiotics have failed due to its potency and to help prevent further resistance development.