Fish · Cyprinus carpio · typical adult weight 0.25–20.00 kg
Contraindicated in Rabbit, Guinea Pig, Chinchilla, Hamster, Degu
Ampicillin is dosed at 50–80 mg/kg oral (in feed) q24h in koi, per Ramsey I, ed. BSAVA Small Animal Formulary, 10th ed. Part B: Exotic Pets. Gloucester: British Small Animal Veterinary Association; 2023. p.37. — LOCATOR CONVENTION 2026-08-07: the bare 'p.37' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.23; verified by finding the drug named there. If you are holding the book, turn to p.23. — SOURCE EDITION: BSAVA Small Animal Formulary, Part B — Exotic Pets — ISBN 9781910443712, https://openlibrary.org/isbn/9781910443712. Ampicillin (Antibiotic) has cited veterinary dosing for koi. Routes documented in koi: oral (in feed). A typical adult koi weighs 0.25–20.00 kg. ExoticRx lists 1 cited dose rule for Ampicillin in koi, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Polyflex
| Route | Dose | Frequency | Indication | Evidence | Source |
|---|---|---|---|---|---|
| oral (in feed) | 50–80 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.37. — LOCATOR CONVENTION 2026-08-07: the bare 'p.37' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.23; verified by finding the drug named there. If you are holding the book, turn to p.23. — SOURCE EDITION: BSAVA Small Animal Formulary, Part B — Exotic Pets — ISBN 9781910443712, https://openlibrary.org/isbn/9781910443712Compilation only — we have not located an independent source that prints this figure. |
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 |
|---|---|---|---|
| 10 | IV | Carpenter's Exotic Animal Formulary, 6th edTable 2.1 | 10 mg/kg q24h IV 50-80 mg/kg/day via feed × 10 days |
| 50–80 | IV | Carpenter's Exotic Animal Formulary, 6th edTable 2.1 | 10 mg/kg q24h IV 50-80 mg/kg/day via feed × 10 days |
| Dose (mg/kg feed) | Route | Source | As printed |
|---|---|---|---|
| 50–80 | IN | BSAVA Small Animal Formulary, 10th ed — Part B (Exotic Pets)p.37 | 50-80 mg/kg in feed q24h for 10 days |
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 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. Broader spectrum than penicillin G with gram-negative coverage.
CONTRAINDICATED in rabbits, guinea pigs, and hamsters (fatal dysbiosis). May cause GI upset. Cross-reactivity with other beta-lactams. IM injection may be painful.
Species-specific contraindications and adverse-reaction reports for koi may differ from canine / feline reference data — consult the primary citations listed with each rule.
Ampicillin dose range in koi, with cited source references: oral (in feed) 50–80 mg/kg q24h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Ampicillin in koi: oral (in feed).
These are general warnings for Ampicillin 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. IM injection may be painful.
Why a species-specific page? Ampicillin pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in koi — 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.