Trimethoprim/sulfadiazine is indicated in horses where potent systemic antibacterial action against sensitive organisms is required. Trimethoprim/sulfadiazine is indicated where control of bacterial infections is required during treatment of: Acute Strangles, Acute Urogenital Infections, Respiratory Tract Infections, Wound Infections and Abscesses, Trimethoprim/sulfadiazine is well tolerated by foals.