Used in veterinary medicine to treat respiratory diseases in cattle and swine caused by susceptible strains of bacteria such as Mannheimia haemolytica, Pasteurella multocida, and Histophilus somni. It is effective in controlling bovine respiratory disease (BRD) and porcine respiratory disease complex (PRDC). Administered as a single injection, it provides prolonged therapeutic levels due to its long half-life, reducing the need for repeated dosing. Its broad-spectrum activity and convenience make it valuable in managing respiratory infections in feedlot cattle and commercial swine operations.