Gentamicin sulfate is a kind of glycoside bactericidal antibiotic, which is composed of amino sugar and ligand. It is the sulfate of gentamicin, and its antibacterial spectrum is similar to that of kanamycin. It is mainly used for systemic or local infections caused by gram negative bacteria such as Escherichia coli, dysentery bacillus, Klebsiella pneumoniae, Proteus, Pseudomonas aeruginosa, etc. Ophthalmology for conjunctivitis, keratitis, etc. Oral administration can be used for intestinal infection or preparation before colon surgery; It can also be combined with metronidazole or clindamycin to reduce the infection rate of colon surgery. Gentamycin sulfate has good antibacterial effect on all kinds of gram negative bacteria and gram positive bacteria, and has good antibacterial effect on all kinds of enterobacteriaceae bacteria, such as Escherichia coli, Klebsiella, Proteus, Salmonella, Shigella, Enterobacter, Serratia and Pseudomonas aeruginosa. Neisseria and Haemophilus influenzae are moderately sensitive to this product.