Gentamicin Piglet Injection (gentamicin sulfate USP, 5 mg/mL) is recommended for the treatment of porcine colibacillosis caused by strains of E. coli sensitive to gentamicin. For use in piglets only, up to 3 days of age. Dose 1 mL per piglet, administered IM, not more than once in each piglet. Meat withdrawal: 40 days. There are no known contraindications to this drug when used as directed.