Pocket Pet · Oryctolagus cuniculus · typical adult weight 1.00–5.00 kg
Fenbendazole is dosed at 20 mg/kg PO q24h x 28 days in rabbits, per Suter C, Muller-Doblies UU, HattJM, et al. Prevention and treatment of Encephalitozoon cuniculi infection in rabbits with fenbendazole. Vet Rec. 2001;148:478-480. doi:10.1136/vr.148.15.478; Mencke N, Bach T. Managing gastrointestinal helminths in small mammals. Comp Cont Educ Pract. 2007;29:13-16. — Verified against Carpenter's Exotic Animal Formulary, 6th Ed, p.850 (2026-08-01). — Carpenter's Exotic Animal Formulary 6th ed, Table 10.3 (Antiparasitic Agents Used in Rabbits.a). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929; Muller & Kirk's Small Animal Dermatology — ISBN 9781416000280, https://openlibrary.org/isbn/9781416000280. Fenbendazole is used in rabbits for E. cuniculi, pinworms, Passalurus ambiguus (pinworms). Routes documented in rabbits: PO. A typical adult rabbit weighs 1.00–5.00 kg. ExoticRx lists 2 cited dose rules for Fenbendazole in rabbits, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Panacur
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 20 mg/kg | q24h x 28 days | 28 days for E. cuniculi; 5 days for pinworms | E. cuniculi, pinworms | Strong | Suter C, Muller-Doblies UU, HattJM, et al. Prevention and treatment of Encephalitozoon cuniculi infection in rabbits with fenbendazole. Vet Rec. 2001;148:478-480. doi:10.1136/vr.148.15.478; Mencke N, Bach T. Managing gastrointestinal helminths in small mammals. Comp Cont Educ Pract. 2007;29:13-16. — Verified against Carpenter's Exotic Animal Formulary, 6th Ed, p.850 (2026-08-01). — Carpenter's Exotic Animal Formulary 6th ed, Table 10.3 (Antiparasitic Agents Used in Rabbits.a). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929; Muller & Kirk's Small Animal Dermatology — ISBN 9781416000280, https://openlibrary.org/isbn/9781416000280 |
| PO | 20 mg/kg | q24h | 5 days; repeat in 2 weeks | Passalurus ambiguus (pinworms) | Strong | Mencke N, Bach T. Managing gastrointestinal helminths in small mammals. Comp Cont Educ Pract. 2007,29:13-16. | Morissey JM, Carpenter JW. Appendix: Formulary. In: Quesenberry KE, Orcutt CJ, Mans C, et al. Ferrets, Rabbits and Rodents: Clinical Medicine and Surgery, 4th ed., Elsevier, 2021:620-630. - Carpenter's Exotic Animal Formulary 6th ed, Table 10.3 (Antiparasitic Agents Used in Rabbits), nematode row: '5-20 mg/kg PO q24h x 5 days, repeat in 14 days162,166 | Nematodes, use 20 mg/kg for Passalurus ambiguous'. |
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 |
|---|---|---|---|
| 20 | PO | BSAVA Small Animal Formulary, 10th ed — Part B (Exotic Pets)p.142 | E. cuniculi: 20 mg/kg p.o. q24h for 28 days a |
| 5–20 | PO | Carpenter's Exotic Animal Formulary, 6th edTable 10.3 | 5-20 mg/kg PO q24h × 5 days; repeat in 14 days,166 |
| 20 | PO | Carpenter's Exotic Animal Formulary, 6th edTable 10.3 | 20 mg/kg PO q24h × 7 days before and 2 days after mixing rabbits |
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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These ranges are per kg. Enter your rabbit'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 rabbits may differ from canine / feline reference data — consult the primary citations listed with each rule.
Fenbendazole dose ranges in rabbits, with cited source references: PO 20 mg/kg q24h x 28 days; PO 20 mg/kg q24h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Fenbendazole in rabbits: PO.
Cited course lengths for Fenbendazole in rabbits include: 28 days for E. cuniculi; 5 days for pinworms; 5 days; repeat in 2 weeks. Duration depends on the indication — match it to the specific dose rule in the table above.
Fenbendazole is indicated in rabbits for: E. cuniculi, pinworms, Passalurus ambiguus (pinworms).
These are general warnings for Fenbendazole across species; consult the rabbit 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 rabbits — 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.