Used to treat a wide range of bacterial infections, particularly those caused by Gram-negative bacteria, including Pseudomonas aeruginosa. Commonly prescribed for infections in the respiratory tract, urinary tract, skin, bones, and blood. Frequently used in hospital settings for severe infections and in patients with weakened immune systems. Also part of combination therapy for febrile neutropenia and in the management of cystic fibrosis patients with lung infections. Effective against many multidrug-resistant organisms, making it a key antibiotic in critical care.