Ceftiofur Products | Cleanchem - Ceftiofur is a third-generation cephalosporin used in veterinary medicine to treat bacterial infections in livestock such as cattle, pigs, and horses. It is effective against respiratory pathogens and is often administered via injection. Ceftiofur has a broad spectrum of activity and is resistant to beta-lactamase enzymes. It is not used in humans to minimize resistance development.