Pocket Pet · Mustela putorius furo · typical adult weight 0.60–2.00 kg
Trimethoprim-Sulfamethoxazole is dosed at 30 mg/kg PO q12h in ferrets, per Hillyer EV, Brown SA. Ferrets. In: Birchard SJ, Sherding RG, eds. Saunders Manual of Small Animal Practice; WB Saunders, Philadelphia, PA; 1994:1317-1344. — Verified against Carpenter's Exotic Animal Formulary, 6th Ed, p.934 (2026-08-01).. Trimethoprim-Sulfamethoxazole is used in ferrets for UTI / chronic skin. Routes documented in ferrets: PO. A typical adult ferret weighs 0.60–2.00 kg. ExoticRx lists 1 cited dose rule for Trimethoprim-Sulfamethoxazole in ferrets, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Bactrim, TMS
| Route | Dose | Frequency | Indication | Evidence | Source |
|---|---|---|---|---|---|
| PO | 30 mg/kg | q12h | UTI / chronic skin | Moderate | Hillyer EV, Brown SA. Ferrets. In: Birchard SJ, Sherding RG, eds. Saunders Manual of Small Animal Practice; WB Saunders, Philadelphia, PA; 1994:1317-1344. — Verified against Carpenter's Exotic Animal Formulary, 6th Ed, p.934 (2026-08-01). |
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These ranges are per kg. Enter your ferret's weight to get the precise dose and draw-up volume — unit and concentration math done for you.
Sequential blockade of folate synthesis: sulfamethoxazole inhibits dihydropteroate synthase; trimethoprim inhibits dihydrofolate reductase.
May cause keratoconjunctivitis sicca (KCS) in dogs with prolonged use. Can cause bone marrow suppression. Avoid in animals with hepatic disease. Adequate hydration required.
Species-specific contraindications and adverse-reaction reports for ferrets may differ from canine / feline reference data — consult the primary citations listed with each rule.
Trimethoprim-Sulfamethoxazole dose range in ferrets, with cited source references: PO 30 mg/kg q12h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Trimethoprim-Sulfamethoxazole in ferrets: PO.
Trimethoprim-Sulfamethoxazole is indicated in ferrets for: UTI / chronic skin.
These are general warnings for Trimethoprim-Sulfamethoxazole across species; consult the ferret dosing table above for species-specific guidance. May cause keratoconjunctivitis sicca (KCS) in dogs with prolonged use. Can cause bone marrow suppression. Avoid in animals with hepatic disease. Adequate hydration required.
Why a species-specific page? Trimethoprim-Sulfamethoxazole pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in ferrets — 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.