Gentamicin (Gentamicin sulfate, Gentak, Genoptic) is a broad spectrum aminoglycoside antibiotic, used in the treatment of serious infections caused by Proteus species, E. coli, Klebsiella-Enterobactor-Serratia species, Citrobacter species, Staphylococcus species, and Pseudomonas aeruginosa. Gentamicin comes as an injectable solution (50 mg/ml) that can be given orally, intranasally, for nebulization, or topically. It also comes as an ophthalmic ointment or optic solution (3 mg/ml) which can be given topically or intranasally. When used for nebulization, 1 ml of the injectable solution can be mixed with 10 ml of saline and nebulized for 15 minutes.
Caution. Due to the potential toxic side effects, this drug should only be given to poultry with life-threatening infections and which are resistant to less toxic antibiotics or amikacin.