Protazil Antiprotozoal Pellets are for the treatment of equine protozoal myeloencephalitis (EPM) caused by Sarcocystis neurona in horses. Protazil Antiprotozoal Pellets contain 1.56% diclazuril to be mixed as a top-dress in feed. Protazil is administered at the rate of 1 mg diclazuril per kg of body weight for 28 days. The quantity of Protazil necessary to deliver this dose is 64 mg pellets per kg of body weight. One 2 lb. bucket of Protazil will treat one 1100 lb. horse for 28 days. Diclazuril.