Is Amprolium (corid) harmful to horses?

Amprolium, commonly known as Corid, is primarily used in cattle and poultry to treat coccidiOSis and is not approved for use in horses. While it is generally considered safe for the species it is intended for, there is limited research on its effects in horses. Administering Amprolium to horses could potentially lead to adverse effects, so it is crucial to consult a veterinarian before using any medication not specifically approved for equine use.