Gentamycin Sulfate Injection is a broad - spectrum antibacterial drug of the aminoglycoside class. It is used to treat severe infections caused by sensitive Gram - negative bacilli, such as Escherichia coli, Klebsiella, Enterobacter, Proteus, Serratia, Pseudomonas aeruginosa, and methicillin - sensitive strains of Staphylococcus, including septicemia, lower - respiratory - tract infections, intestinal infections, pelvic infections, abdominal infections, skin and soft - tissue infections, and complicated urinary - tract infections.