Used to treat a wide range of bacterial infections, including respiratory tract infections, urinary tract infections, skin infections, and intra-abdominal infections. Particularly effective against Gram-negative bacteria and some Gram-positive organisms. Often used in hospital settings for severe infections and can be part of combination therapy with other antibiotics. Commonly administered intravenously or intramuscularly when rapid or high concentration of the drug is needed. Also used in patients with compromised immune systems or those undergoing surgery to prevent postoperative infections.