Tobramycin is an aminoglycoside antibiotic. This antibiotic irreversibly binds to the 30S ribosomal subunit of bacteria, inhibiting protein synthesis. This antibiotic is most active against gram-negative bacteria such as strains of Staphylococcus, Streptococci, E. coli, Enterobacter, Serratia, Pseudomonas, Citrobacter, Aeromonas hydrophilia, Klebsiella, etc. .