Futoquinol is primarily used as a veterinary antiprotozoal agent, especially in the treatment and prevention of coccidiosis in poultry and livestock. It is effective against various species of Eimeria, which are parasitic protozoa that cause intestinal damage and reduced productivity in animals. By inhibiting the growth and reproduction of these parasites, Futoquinol helps improve weight gain, feed efficiency, and overall health in infected animals. It is commonly administered through feed in controlled concentrations, making it suitable for large-scale farming operations. Its use is typically limited to specific growth phases to minimize resistance development and ensure food safety.