Semisynthetic aminoglycoside antibiotic of broad spectrum of action. Communicates with 30S subunit of ribosomes and disrupts protein synthesis, preventing the formation of a complex of transport and information RNA, thus disrupting the reading of the genetic code and the formation of non-functional proteins; polyribosomes split and lose the ability to synthesize a protein. In high concentrations reduces the barrier functions of cell membranes and causes the death of microorganisms. Highly active against gram-negative microorganisms (Pseudomonas aeruginosa, Escherichia coli, Klebsiella spp., Serratia spp., Providencia spp., Enterobacter spp., Proteus mirabilis, Proteus vulgaris, Citrobacter spp., Morganella morganii, Aeromonas spp., Neisseria gonorrhoeae, Salmonella spp., Shigella spp. ), as well as some Gram-positive microorganisms (Staphylococcus spp., in t.ch. resistant to others.aminoglycosides, penicillin, methicillin, some cephalosporins), some strains Streptococcus spp.