Used in the treatment of infections caused by susceptible bacteria in horses, dogs, cattle, sheep, and goats. It is used as parenteral support for respiratory system infections such as pneumonia, pleuropneumonia, and enzootic pneumonia caused by Pasteurella haemolytica and Pasteurella multocida, urogenital system infections, digestive system infections, soft tissue infections, interhoof and other wound infections, mastitis, and metritis.