Used primarily as a coccidiostat in poultry feed to prevent coccidiosis, a parasitic disease affecting the intestinal tract of birds. It is highly effective against various Eimeria species, helping to improve feed efficiency and weight gain in broiler chickens. Due to its narrow safety margin, it is used at very low concentrations and is strictly regulated to avoid toxicity in non-target species, especially horses. Its use is prohibited in laying hens due to residue concerns in eggs. Commonly included in commercial poultry rations under veterinary supervision.