Polysynthetic aminoglycoside antibiotic of broad spectrum of action. Communicates with 30S subunit of ribosomes and violates protein synthesis, preventing the formation of a complex of transport and information RNA, violation of the reading of the genetic code and, the formation of non-functional proteins; polyribosomes split and lose the ability to synthesize a protein. AT v high concentrations reduces the barrier function of cell membranes and causes the death of microorganisms.