Fish · Carassius auratus · typical adult weight 0.01–3.00 kg
Toltrazuril is dosed at 5–20 mg/l by immersion q48h in goldfish, per Ramsey I, ed. BSAVA Small Animal Formulary, 10th ed. Part B: Exotic Pets. Gloucester: British Small Animal Veterinary Association; 2023. p.299. — LOCATOR CONVENTION 2026-08-07: the bare 'p.299' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.285; verified by finding the drug named there. If you are holding the book, turn to p.285. — SOURCE EDITION: BSAVA Small Animal Formulary, Part B — Exotic Pets — ISBN 9781910443712, https://openlibrary.org/isbn/9781910443712. Toltrazuril (Antiparasitic) has cited veterinary dosing for goldfish. Routes documented in goldfish: by immersion. A typical adult goldfish weighs 0.01–3.00 kg. ExoticRx lists 1 cited dose rule for Toltrazuril in goldfish, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Baycox
| Route | Dose | Frequency | Indication | Evidence | Source |
|---|---|---|---|---|---|
| by immersion | 5–20 mg/l | q48h | — | Moderate |
Every held source for this drug and species, as printed. Where they differ, both are shown — the choice is yours, not ours.
| Dose (mg/l) | Route | Source | As printed |
|---|---|---|---|
| 5–20 | IMMERSION | BSAVA Small Animal Formulary, 10th ed — Part B (Exotic Pets)p.299 | 5-20 mg/l by immersion for 1-4 hours q48h, repeated 3 times |
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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Enter your goldfish's weight to check these cited ranges in the calculator — unit and concentration math done for you.
Disrupts mitochondrial function and nuclear division in all intracellular stages of coccidia. Coccidiocidal rather than coccidiostatic.
Generally well-tolerated. Primarily used for coccidiosis. Single-dose or short-course treatment. Bitter taste. Extra-label use in small animals.
Species-specific contraindications and adverse-reaction reports for goldfish may differ from canine / feline reference data — consult the primary citations listed with each rule.
Toltrazuril dose range in goldfish, with cited source references: by immersion 5–20 mg/l q48h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Toltrazuril in goldfish: by immersion.
These are general warnings for Toltrazuril across species; consult the goldfish dosing table above for species-specific guidance. Generally well-tolerated. Primarily used for coccidiosis. Single-dose or short-course treatment. Bitter taste. Extra-label use in small animals.
Why a species-specific page? Toltrazuril pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in goldfish — 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.