Description: Netilmicin, a semisynthetic and water soluble analog of sisomicin, is a member of the aminoglycoside family of antibiotics. It is active against most Gram-negative and some Gram-positive bacteria, including certain strains resistant to gentamicin. Netilmicin Sulfate is a semisynthetic derivative of sisomicin. It shows activity against aminoglycoside-resistant bacteria and much decreased chronic toxicity in animals relative to sisomicin, gentamicin and tobramycin. Netilmicin Sulfate shows high activity against E. coli, Klebsiella, Enterobacter, Citrobacter, Proteus spp and Staph. Aureus. In addition, 87% of indole-positive Proteus strains, 90.7% of Serratia and 83.5% of Ps. Aeruginosa strains are sensitive to Netilmicin Sulfate.