Dimenidazole is an animal-specific antiprotozoal drug. Since metronidazole was banned, dimenidazole is almost the only choice. It can inhibit the redox reaction of amoeba protozoa and break the nitrogen chain; it is effective against protozoa such as trichomoniasis, trichomonas, porcine colonic ciliates, flagellates, eperythrocytes, etc.; it is effective against anaerobic bacteria (necrotic bacteria) , Clostridium, Staphylococcus, Enterobacter), etc. It has a significant inhibitory effect. It is also effective against spirochetes between protozoa and bacteria. It is an effective drug for treating swine dysentery.