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 (46 dose rules)
Evidence levels across 46 dose rules
Each ExoticRx dose rule is graded by the strength of its primary evidence — see the editorial process.
Backed by 8 published primary 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 46 cited rules)
Free-tier preview — dog and cat dosing. Pro and Student unlock all 18 species including reptiles, birds, pocket pets, livestock, and equine.
| Species | Route | Dose | Frequency | Evidence | Source |
|---|---|---|---|---|---|
| Dog (Domestic) | PO | 50 mg/kg | q24h | Strong | Plumb's Veterinary Drug Handbook, 9th Ed |
| Dog (Domestic) | PO | 50 mg/kg | q24h | Strong | Plumb's Veterinary Drug Handbook, 9th Ed |
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View PlansArticles mentioning Fenbendazole
- 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.
- Bearded Dragon Drug Dosing: Vet Reference GuideAntibiotic, antiparasitic, and analgesic dosing notes for Pogona vitticeps — and what reptile physiology means for the drugs you reach for first.
More Antiparasitic drugs
Source citations and evidence levels available on the live page. Reference only — verify against current literature before clinical use.