Gentamicina Injection 80 MG 2 ML is used to treat serious bacterial infections in a variety of body locations. Gentamicin is an aminoglycoside antibiotic, which means it belongs to a group of drug. It works by either killing or stopping germs from growing. It also prevents the infection from spreading by not allowing the germs to proliferate. It also reduces bacteria's adhesion to cells lining the urinary bladder, reducing the risk of bladder infection caused by E Coli bacterium.