Fish · Cyprinus carpio · typical adult weight 0.25–20.00 kg
Amoxicillin is dosed at 12.5 mg/kg i.m. once in kois, per Ramsey I, ed. BSAVA Small Animal Formulary, 10th ed. Part B: Exotic Pets. Gloucester: British Small Animal Veterinary Association; 2023. p.34. — LOCATOR CONVENTION 2026-08-07: the bare 'p.34' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.20; verified by finding the drug named there. If you are holding the book, turn to p.20. — SOURCE EDITION: BSAVA Small Animal Formulary, Part B — Exotic Pets — ISBN 9781910443712, https://openlibrary.org/isbn/9781910443712. Amoxicillin (Antibiotic) has cited veterinary dosing for kois. Routes documented in kois: i.m., in feed. A typical adult koi weighs 0.25–20.00 kg. ExoticRx lists 2 cited dose rules for Amoxicillin in kois, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Amoxi-Tabs, Amoxil
Contraindicated in Rabbit, Guinea Pig, Chinchilla, Hamster, Degu
| Route | Dose | Frequency | Indication | Evidence | Source |
|---|---|---|---|---|---|
| i.m. | 12.5 mg/kg | once | — | Moderate | Ramsey I, ed. BSAVA Small Animal Formulary, 10th ed. Part B: Exotic Pets. Gloucester: British Small Animal Veterinary Association; 2023. p.34. — LOCATOR CONVENTION 2026-08-07: the bare 'p.34' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.20; verified by finding the drug named there. If you are holding the book, turn to p.20. — SOURCE EDITION: BSAVA Small Animal Formulary, Part B — Exotic Pets — ISBN 9781910443712, https://openlibrary.org/isbn/9781910443712 |
| in feed | 40–80 mg/kg | q24h | — | Moderate | Ramsey I, ed. BSAVA Small Animal Formulary, 10th ed. Part B: Exotic Pets. Gloucester: British Small Animal Veterinary Association; 2023. p.34. — LOCATOR CONVENTION 2026-08-07: the bare 'p.34' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.20; verified by finding the drug named there. If you are holding the book, turn to p.20. — SOURCE EDITION: BSAVA Small Animal Formulary, Part B — Exotic Pets — ISBN 9781910443712, https://openlibrary.org/isbn/9781910443712 |
Every held source for this drug and species, as printed. Where they differ, both are shown — the choice is yours, not ours.
The sources disagree for this combination. The ranges below do not overlap on a comparable route. This is not an error in one of them — published veterinary references differ, and reconciling them for a particular patient is a clinical judgement.
| Dose (mg/kg) | Route | Source | As printed |
|---|---|---|---|
| 12.5 | IM | BSAVA Small Animal Formulary, 10th ed — Part B (Exotic Pets)p.34 | 40-80 mg/kg in feed q24h for 10 days or 12.5 mg/kg i.m. once (long-acting preparation) |
| 40 | IV | Carpenter's Exotic Animal Formulary, 6th edTable 2.1 | 40 mg/kg IV q24h |
| 80 | PO | Carpenter's Exotic Animal Formulary, 6th edTable 2.1 | 80 mg/kg PO q24h × 10 days |
| 40–80 | — |
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These ranges are per kg. Enter your koi's weight to get the precise dose and draw-up volume — unit and concentration math done for you.
Inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs).
CONTRAINDICATED in rabbits, guinea pigs, and hamsters (fatal dysbiosis). May cause GI upset. Cross-reactivity with other beta-lactams.
Species-specific contraindications and adverse-reaction reports for kois may differ from canine / feline reference data — consult the primary citations listed with each rule.
Amoxicillin dose ranges in kois, with cited source references: i.m. 12.5 mg/kg once; in feed 40–80 mg/kg q24h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Amoxicillin in kois: i.m., in feed.
These are general warnings for Amoxicillin across species; consult the koi dosing table above for species-specific guidance. CONTRAINDICATED in rabbits, guinea pigs, and hamsters (fatal dysbiosis). May cause GI upset. Cross-reactivity with other beta-lactams.
Why a species-specific page? Amoxicillin pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in kois — 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.
| Carpenter's Exotic Animal Formulary, 6th edTable 2.1 |
| 40-80 mg/kg q24h via feed × 10 days 110 mg/kg/day via Ch feed |
| 110 | — | Carpenter's Exotic Animal Formulary, 6th edTable 2.1 | 40-80 mg/kg q24h via feed × 10 days 110 mg/kg/day via Ch feed |
| Dose (mg/kg feed) | Route | Source | As printed |
|---|---|---|---|
| 40–80 | IN | BSAVA Small Animal Formulary, 10th ed — Part B (Exotic Pets)p.34 | 40-80 mg/kg in feed q24h for 10 days or 12.5 mg/kg i.m. once (long-acting preparation) |
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.