Fenbendazole 500 Mg is a broad-spectrum anthelmintic medication widely used in veterinary medicine to treat a variety of internal parasitic infections. It is effective against several common gastrointestinal and respiratory parasites in animals, particularly dogs, cats, livestock, and other domestic species. Below are the main parasites killed or controlled by Fenbendazole 500 mg. Roundworms (Ascarids) Fenbendazole is highly effective against roundworms such as Toxocara canis and Toxascaris leonina in dogs, as well as Ascaris species in livestock. These parasites live in the intestines and can cause weight loss, diarrhea, bloating, and poor growth. Fenbendazole works by disrupting the worm’s energy metabolism, leading to paralysis and death. Hookworms Hookworms like Ancylostoma caninum and Uncinaria stenocephala are also susceptible to Fenbendazole. These blood-feeding parasites attach to the intestinal lining and may cause anemia, weakness, and bloody stools. Fenbendazole helps eliminate adult hookworms and reduces the overall parasite burden. Whipworms Fenbendazole is one of the most reliable treatments for whipworms (Trichuris vulpis). Whipworm infections can be difficult to treat due to the parasite’s long life cycle, but Fenbendazole effectively targets adult worms and is often used in repeated treatment schedules for complete control. Lungworms Certain lungworms, such as Oslerus osleri and Aelurostrongylus abstrusus, can also be treated with Fenbendazole. These parasites affect the respiratory system and may cause coughing, breathing difficulty, and reduced stamina. Tapeworms (Limited Activity) Fenbendazole has limited effectiveness against some tapeworm species, including Taenia spp., but it is not effective against Dipylidium caninum. For complete tapeworm treatment, Praziquantel is usually preferred. In summary, Fenbendazole 500 mg is effective against roundworms, hookworms, whipworms, and certain lungworms, making it a trusted choice for managing common parasitic infections in animals when used under veterinary guidance.