is a triazine acetonitrile compound. It is a new, high-efficiency, low-toxic anticoccidial drug, widely used in chicken coccidiosis. The mechanism of diclazuril's anticoccidial action is not yet clear. The main peak period of action on coccidia varies with different species of coccidia. For example, the main point of action on Eimeria tenella is the sexual cycle of the second generation schizont coccidia. But it is ineffective against the giant, Eimeria brucei schizonts. The action point for giant Eimeria is in the zygote stage of coccidia; it is highly effective for the small gametophyte stage of Eimeria brucei.
Diclazuril also has an inhibitory effect on the formation of sporulated oocysts. Diclazuril premix is a white or light yellow powder; almost odorless, it is slightly soluble in dimethylformamide, slightly soluble in tetrahydrofuran, and almost insoluble in water and ethanol. Insoluble in water limits its use.