Pocket Pet · Cavia porcellus · typical adult weight 0.70–1.20 kg
Fenbendazole is dosed at 20–50 mg/kg PO q24h in guinea pigs, per Adamcak A, Otten B. Rodent therapeutics. Vet Clin North Am Exot Anim Pract. 2000;3:221-237.; Meredith A. BSAVA Small Animal Formulary: Part B: Exotic Pets, British Small Animal Veterinary Association, Quedgeley, Gloucester, UK; 2015.; Morrisey JK, Carpenter JW. Formulary. In: Quesenberry KE, Carpenter JW, eds. Ferrets, Rabbits, and Rodents: Clinical Medicine and Surgery, 4th ed., Elsevier, St. Louis, MO; 2021:620-630. — Verified against Carpenter's Exotic Animal Formulary, 6th Ed, p.776 (2026-08-01).. Fenbendazole is used in guinea pigs for Capillaria, pinworms, Nematode infections. Routes documented in guinea pigs: PO. A typical adult guinea pig weighs 0.70–1.20 kg. ExoticRx lists 2 cited dose rules for Fenbendazole in guinea pigs, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Panacur
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 20–50 mg/kg | q24h | 5 days; repeat in 2 weeks | Capillaria, pinworms | Moderate | Adamcak A, Otten B. Rodent therapeutics. Vet Clin North Am Exot Anim Pract. 2000;3:221-237.; Meredith A. BSAVA Small Animal Formulary: Part B: Exotic Pets, British Small Animal Veterinary Association, Quedgeley, Gloucester, UK; 2015.; Morrisey JK, Carpenter JW. Formulary. In: Quesenberry KE, Carpenter JW, eds. Ferrets, Rabbits, and Rodents: Clinical Medicine and Surgery, 4th ed., Elsevier, St. Louis, MO; 2021:620-630. — Verified against Carpenter's Exotic Animal Formulary, 6th Ed, p.776 (2026-08-01). |
| PO | 20–50 mg/kg | q24h | 5 days | Nematode infections | Moderate | Adamcak A, Otten B. Rodent therapeutics. Vet Clin North Am Exot Anim Pract. 2000;3:221-237.; Meredith A. BSAVA Small Animal Formulary: Part B: Exotic Pets, British Small Animal Veterinary Association, Quedgeley, Gloucester, UK; 2015.; Morrisey JK, Carpenter JW. Formulary. In: Quesenberry KE, Carpenter JW, eds. Ferrets, Rabbits, and Rodents: Clinical Medicine and Surgery, 4th ed., Elsevier, St. Louis, MO; 2021:620-630. — Verified against Carpenter's Exotic Animal Formulary, 6th Ed, p.776 (2026-08-01). |
Need the exact dose for your patient?
These ranges are per kg. Enter your guinea pig'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 guinea pigs may differ from canine / feline reference data — consult the primary citations listed with each rule.
Fenbendazole dose ranges in guinea pigs, with cited source references: PO 20–50 mg/kg q24h; PO 20–50 mg/kg q24h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Fenbendazole in guinea pigs: PO.
Cited course lengths for Fenbendazole in guinea pigs include: 5 days; repeat in 2 weeks; 5 days. Duration depends on the indication — match it to the specific dose rule in the table above.
Fenbendazole is indicated in guinea pigs for: Capillaria, pinworms, Nematode infections.
These are general warnings for Fenbendazole across species; consult the guinea pig 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 guinea pigs — 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.