This product is an anti worm drug. Broad spectrum, high efficiency, low toxicity, antiparasitic drugs. It has strong repellent effect on Ascaris lumbricoides, nematodes, tapeworms, cysticercosis, Fasciola hepatica and other parasites. It can not only kill worms, but also has great curative effect on liver, lung and intestinal tract. Fenbendazole is a kind of benzimidazole insecticide. It not only has high repellent activity to adult and larva of gastrointestinal nematode, but also has good effect on reticulum, Fasciola and tapeworm. It also has strong egg killing effect.