Arprinocid is primarily used in veterinary medicine as an anticoccidial agent. It is effective in preventing and treating coccidiosis, a parasitic disease that affects the intestinal tracts of animals, particularly poultry. By inhibiting the growth and reproduction of coccidia, it helps improve the health and productivity of livestock. It is often administered through feed, ensuring easy and efficient delivery to the animals. Its use supports the poultry industry by reducing economic losses associated with coccidial infections and promoting better growth rates in birds.