Fenbendazole powder is a wormer used to treat many different types of parasites in dogs. The medication blocks the worms’ ability to produce energy, ultimately starving them to death. It also kills immature worms (eggs and larvae) as well.
It is safe to use in pregnant and nursing dogs, but the dosage should be reduced. Check with your veterinarian for the correct dosage for your dog.
In horses, fenbendazole is FDA-approved to remove large strongyles (Strongylus edentatus, Strongylus equinus, S vulgaris), small strongyles (Cyathostomum spp, Cylicocyclus spp, Cylicostephanus spp, Triodontophorus spp), pinworms (Oxyuris equorum), and ascarids (Parascaris equorum). It is also effective in treating lungworms in cattle (Metastrongylus apri, Metastrongylus pudendotectus) and stomach worms in nonlactating goats (Haemonchus contortus, Ostertagia ostertagi, Trichostrongylus axei, Bunostomum phlebotomum). In big cats (lions, tigers, and leopards), it is effective in controlling hookworms and/or tapeworms.
A typical fenbendazole treatment may cause loose stools for several days. This is a normal side effect and a good sign that the medication is working. Your veterinarian may recommend a probiotic to help offset the effects of the diarrhea.
It is important to carefully handle a dog’s stool before and after giving them this drug. It can contain eggs and/or larvae that can infect humans as well. If you must handle your pet’s feces, make sure to thoroughly wash your hands afterwards with hot, soapy water. It is also a good idea to avoid contacting the eyes or mouth when handling this medicine. fenbendazole powder