Fenbendazole

Fenbendazole Wormer

Fenbendazole  belongs to a category of drugs known as anthelmintics . Fenbendazole is often abbreviated "FBZ". This drug is regularly used to eliminate numerous gastrointestinal parasites from animals. Fenbendazole is available over the counter but should not be administered unless under the supervision and guidance of a veterinarian. It should also not be used in animals with known hypersensitivity or allergy to the drug.

Fenbendazole is quite effective against roundworms, hookworms, whipworms, certain tapeworms and parasites called strongyles and strongyloides. Dogs and cats may be infected subclinically and show no signs.

Fenbendazole  is (labeled) for the removal of the following parasites in cattle: Adult forms of: Haemonchus contortus, Ostertagia ostertagi, Trichostrongylus axei, Bunostomum phlebotomum, Nematodirus helvetianus, Cooperia spp., Trichostrongylus colubriformis, Oesophagostomum radiatum and Dictyocaulus vivaparus. It is also helpful against most immature stages of the above listed parasites. Although not official, it also has good activity against Moniezia spp., and arrested 4th stage forms of Ostertagia ostertagi.

Fenbendazole  is (labeled) for the removal of the following parasites in horses: large strongyles (S. edentatus, S. equinus, S. vulgaris), small strongyles (Cyathostomum spp., Cylicocylus spp., Cylicostephanus spp.,Triodontaphorus spp.) and pinworms (Oxyuris equi).

Fenbendazole  is (labeled) for the removal of the following parasites in swine: large roundworms (Ascaris suum), lungworms (Metastrongylus apri), nodular worms (Oesphagostomum dentatum, O. quadrispinulatum), small stomach worms (Hyostrongylus rubidus), whipworms (Trichuris suis) and kidney worms (Stephanuris dentatus; both mature and immature).

Although not official, fenbendazole has been used in cats, sheep, goats, pet birds and llamas. Fenbendazole is considered to be harmless to use in pregnant bitches and is normally considered to be harmless to use in pregnancy for all species.

Drug Interactions or Contraindications: Fenbendazole is not recommended to be given concurrently with bromsalan flukicides due to the possiblity that it can cause abortions in animals.

Brand Name: Panacur

Available in oral suspension and granules

Formal Chemical Name (IUPAC)
methyl 5-(phenylthio)-1H-benzo[d]imidazol-2-ylcarbamate

Human formulations: None

Veterinary formulations: Panacur® (Hoechst), Safe-Guard® (Hoechst) and various other generics preparations

Human-Approved Products:  None

Fenbendazole generally is not effective as a one-time dose.

Fenbendazole is also effective against certain parasites of the bronchial tree and lungs (Aelurostrongylus and Paragonimiasis).