Dog · Canis lupus familiaris · typical adult weight 2.00–80.00 kg
Fenbendazole is dosed at 50 mg/kg PO q24h in dogs, per SAFE-GUARD - Fenbendazole Granule [US Product Label for Dogs]. Merck Animal Health; 2021. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=0b88111d-db04-46c4-99c3-da1b748c1d60 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.533 (2026-08-01).. Fenbendazole is used in dogs for Roundworms, hookworms, whipworms, Giardia, Whipworms (Trichuris vulpis), Hookworms (Ancylostoma caninum), Giardia. Routes documented in dogs: PO. A typical adult dog weighs 2.00–80.00 kg. ExoticRx lists 4 cited dose rules for Fenbendazole in dogs, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Panacur
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 50 mg/kg | q24h | 3-5 consecutive days; repeat in 2-3 weeks for whipworms | Roundworms, hookworms, whipworms, Giardia | Strong | SAFE-GUARD - Fenbendazole Granule [US Product Label for Dogs]. Merck Animal Health; 2021. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=0b88111d-db04-46c4-99c3-da1b748c1d60 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.533 (2026-08-01). |
| PO | 50 mg/kg | q24h | 3 consecutive days; repeat in 3 weeks and 3 months | Whipworms (Trichuris vulpis) | Strong | SAFE-GUARD - Fenbendazole Granule [US Product Label for Dogs]. Merck Animal Health; 2021. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=0b88111d-db04-46c4-99c3-da1b748c1d60 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.533 (2026-08-01). |
| PO | 50 mg/kg | q24h | 3 consecutive days | Hookworms (Ancylostoma caninum) | Strong | SAFE-GUARD - Fenbendazole Granule [US Product Label for Dogs]. Merck Animal Health; 2021. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=0b88111d-db04-46c4-99c3-da1b748c1d60 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.533 (2026-08-01). |
| PO | 50 mg/kg | q24h | 5 consecutive days | Giardia | Strong | PANACUR - Small Animal 10% Oral Suspension [UK Product Label for Dogs and Cats]. MSD Animal Health; 2021. 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). |
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These ranges are per kg. Enter your dog's weight to get the precise dose and draw-up volume — unit and concentration math done for you.
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 dogs may differ from canine / feline reference data — consult the primary citations listed with each rule.
Fenbendazole dose ranges in dogs, with cited source references: PO 50 mg/kg q24h; PO 50 mg/kg q24h; PO 50 mg/kg q24h; PO 50 mg/kg q24h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Fenbendazole in dogs: PO.
Cited course lengths for Fenbendazole in dogs include: 3-5 consecutive days; repeat in 2-3 weeks for whipworms; 3 consecutive days; repeat in 3 weeks and 3 months; 3 consecutive days; 5 consecutive days. Duration depends on the indication — match it to the specific dose rule in the table above.
Fenbendazole is indicated in dogs for: Roundworms, hookworms, whipworms, Giardia, Whipworms (Trichuris vulpis), Hookworms (Ancylostoma caninum), Giardia.
These are general warnings for Fenbendazole across species; consult the dog 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 dogs — 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.