Fenbendazole for Dogs

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

Dose ranges

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

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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-specific contraindications and adverse-reaction reports for dogs may differ from canine / feline reference data — consult the primary citations listed with each rule.

Frequently asked questions

What is the dose of Fenbendazole for Dogs?

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.

How is Fenbendazole administered in Dogs?

Documented routes for Fenbendazole in dogs: PO.

How long is Fenbendazole given in Dogs?

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.

What conditions does Fenbendazole treat in Dogs?

Fenbendazole is indicated in dogs for: Roundworms, hookworms, whipworms, Giardia, Whipworms (Trichuris vulpis), Hookworms (Ancylostoma caninum), Giardia.

What are the side effects of Fenbendazole in Dogs?

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.