Isepamicin (Sch 21420) is a potent aminoglycoside antibacterial compound with enhanced efficacy against strains harboring type I 6'-acetyltransferase. Its antibacterial spectrum encompasses Enterobacteriaceae and staphylococci, while exhibiting resistance against anaerobes, Neisseriaceae, and streptococci. Moreover, Isepamicin displays a robust concentration-dependent bactericidal effect, a prolonged post-antibiotic effect lasting several hours, and is capable of inducing adaptive resistance.

Isepamicin sulfate (sch21420) Sulphate) , an aminoglycoside antibacterial with good activity against strains producing type I 6-acetyltransferase, inhibits bacterial protein synthesis by targeting the bacterial 30S ribosomal subunit.