Equine · Equus caballus · typical adult weight 350.00–700.00 kg
Fenbendazole is dosed at 5–10 mg/kg PO single dose or 5-day course in horses, per PANACUR - Fenbendazole Paste [US Product Label for Horses]. Merck Animal Health; 2021. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=859d4e30-d70c-4baf-aa62-0d3feff25057; PANACUR - Fenbendazole Suspension 10% [US Product Label]. Merck Animal Health; 2022. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=859d4e30-d70c-4baf-aa62-0d3feff25057 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.533 (2026-08-01). — Plumb's 10th ed (held) printed p.505, Fenbendazole monograph spanning p.505-507; page located 2026-08-05 from the book's own running heads, verified to name the drug in its body text. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207. Fenbendazole is used in horses for Large and small strongyles, ascarids, pinworms. Routes documented in horses: PO. A typical adult horse weighs 350.00–700.00 kg. ExoticRx lists 1 cited dose rule for Fenbendazole in horses, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Panacur
| Route | Dose | Frequency | Indication | Evidence | Source |
|---|
| PO | 5–10 mg/kg | single dose or 5-day course | Large and small strongyles, ascarids, pinworms | Strong | PANACUR - Fenbendazole Paste [US Product Label for Horses]. Merck Animal Health; 2021. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=859d4e30-d70c-4baf-aa62-0d3feff25057; PANACUR - Fenbendazole Suspension 10% [US Product Label]. Merck Animal Health; 2022. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=859d4e30-d70c-4baf-aa62-0d3feff25057 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.533 (2026-08-01). — Plumb's 10th ed (held) printed p.505, Fenbendazole monograph spanning p.505-507; page located 2026-08-05 from the book's own running heads, verified to name the drug in its body text. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207 |
Every held source for this drug and species, as printed. Where they differ, both are shown — the choice is yours, not ours.
| Dose (mg/kg) | Route | Source | As printed |
|---|---|---|---|
| 5.1 | PO | Papich Saunders Handbook of Veterinary Drugs, 4th edp.344 | or paste is administered at a dose of 5.1 mg/kg (2.3 mg/pound) PO. Two pack- |
| 5 | PO | Papich Saunders Handbook of Veterinary Drugs, 4th edp.344 | administered to horses at a dose of 5 mg/kg PO. Retreatment at 6-8 weeks may |
| 10 | — | Papich Saunders Handbook of Veterinary Drugs, 4th edp.344 | dose of 10 mg/kg is recommended. |
Figures are transcribed from the cited page or table of each held edition and are shown for reference only. They are not dose recommendations, they do not feed the calculator, and none has been reviewed by a veterinarian.
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Binds to beta-tubulin, inhibiting microtubule polymerization in parasites. Disrupts energy metabolism and cell division.
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-specific contraindications and adverse-reaction reports for horses may differ from canine / feline reference data — consult the primary citations listed with each rule.
Fenbendazole dose range in horses, with cited source references: PO 5–10 mg/kg single dose or 5-day course. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Fenbendazole in horses: PO.
Fenbendazole is indicated in horses for: Large and small strongyles, ascarids, pinworms.
These are general warnings for Fenbendazole across species; consult the horse dosing table above for species-specific guidance. 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.
Why a species-specific page? Fenbendazole pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in horses — the rules above are the citations specific to this species, not generic recommendations.
Sourced from published veterinary references; awaiting credentialed clinical reviewer. See our editorial process. Reference only — not veterinary advice.