Overview Neomycin is a widely used antibiotic that belongs to the aminoglycoside class of medications. Known for its effectiveness against a broad range of bacteria, neomycin is commonly found in topical creams, eye drops, ear preparations, and sometimes in oral formulations. While highly effective, it must be used cautiously due to the potential for side effects, especially when used systemically. What is Neomycin? Neomycin is an aminoglycoside antibiotic derived from Streptomyces fradiae, a species of soil-dwelling bacteria. It is primarily used to treat or prevent infections caused by bacteria. It is not effective against viral or fungal infections. Neomycin is…