Ormetoprim is primarily used in veterinary medicine as an antibacterial agent, particularly in aquaculture and livestock. It is often combined with sulfadimethoxine to enhance its efficacy against a broad spectrum of bacterial infections. In aquaculture, it is applied to treat diseases in fish, such as furunculosis and other bacterial infections, improving survival rates and overall health. In livestock, it is used to control respiratory and enteric infections, ensuring better growth and productivity. Its ability to inhibit bacterial dihydrofolate reductase makes it effective in preventing and treating infections caused by susceptible organisms. Proper dosing and adherence to regulatory guidelines are essential to minimize the risk of resistance development.