ExoticRx · exoticrx.com/drugs/fenbendazole
Fenbendazole
Panacur
Drug Class
Routes
Indications
Mechanism of Action
Binds to beta-tubulin, inhibiting microtubule polymerization in parasites. Disrupts energy metabolism and cell division.
Side effects & warnings
Very wide safety margin. Rarely causes vomiting or diarrhea. Safe in pregnant animals at standard doses. Must be given for multiple consecutive days for efficacy.
Species with Fenbendazole dosing data (29 dose rules)
Species references:All African Grey Parrot drugsAll African Pygmy Hedgehog drugsAll Ball Python drugsAll Bearded Dragon drugsAll Cat (Domestic) drugsAll Cattle (Beef/Dairy) drugsAll Chicken (Poultry) drugsAll Chinchilla drugsAll Dog (Domestic) drugsAll Ferret drugsAll Goat (Caprine) drugsAll Guinea Pig drugsAll Horse (Equine) drugsAll Pet Rat drugsAll Rabbit (Domestic) drugsAll Sheep (Ovine) drugsAll Swine (Pig) drugsAll Turkey drugs
Evidence levels across 29 dose rules
Each ExoticRx dose rule is graded by the strength of its primary evidence — see the editorial process.
Backed by 8 published sources
- · Carpenter's Exotic Animal Formulary, 6th Ed
- · ExoticRx 2026 (chinchilla dosing guide); Carpenter 6e
- · ExoticRx 2026 (ferret dosing guide); Carpenter 6e
- · ExoticRx 2026 (hedgehog dosing guide); Carpenter 6e
- · ExoticRx 2026 (rat dosing guide); Carpenter 6e
- · FARAD Withdrawal Guidelines
- · FDA NADA Label
- · Plumb's Veterinary Drug Handbook, 9th Ed
Sample dosing (2 of 29 cited rules)
A dog/cat sample is shown here. Cited dosing for all 18 species — reptiles, birds, pocket pets, livestock, and equine — is free on the per-species pages above. Pro adds the weight-based calculator for every species.
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Upgrade to Pro or Student to unlock the full dose ranges and frequency for every species. The drug's mechanism, warnings, indications, and cited sources are free to read.
View PlansArticles mentioning Fenbendazole
- Encephalitozoon cuniculus in Rabbits: Diagnosis and TreatmentWhen to test for E. cuniculus, how to interpret antibody titres, and the fenbendazole-based treatment protocol used in pet rabbit practice.
- Antibiotic Selection in Exotic Animals: Principles and PitfallsHow to choose an antibiotic for rabbits, guinea pigs, parrots, and reptiles — with the species-specific contraindications general practice reaches for first by reflex.
- Ball Python Drug Dosing: A Vet's ReferenceAntibiotic, antiparasitic, and supportive-care dosing for Python regius — and the snake-specific physiology that drives the choices.
- Guinea Pig Drug Dosing: A Vet Quick ReferenceAntibiotic, analgesic, and antifungal dosing for Cavia porcellus — and why they're not just small rabbits.
- Rabbit Drug Dosing: A Vet's Quick ReferenceAntibiotic, analgesic, and antiparasitic dosing for domestic rabbits — and the oral antibiotics you must never reach for.
More Antiparasitic drugs
Source citations and evidence levels available on the live page. Reference only — verify against current literature before clinical use.