Equine · Equus caballus · typical adult weight 350.00–700.00 kg
Marbofloxacin (Livestock) is dosed at 2 mg/kg PO q24h in horses, per Verified against Papich/Saunders Handbook of Veterinary Drugs, 4th Ed, p.501 (2026-08-01). — LOCATOR CONVENTION 2026-08-07: the bare 'p.501' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.473; verified by finding the drug named there. If you are holding the book, turn to p.473. — SOURCE EDITION: Saunders Handbook of Veterinary Drugs — ISBN 9780323244855, https://openlibrary.org/isbn/9780323244855. Marbofloxacin (Livestock) is used in horses for Susceptible gram-negative bacterial infection (may be insufficient for gram-positive cocci). Routes documented in horses: PO. A typical adult horse weighs 350.00–700.00 kg. ExoticRx lists 1 cited dose rule for Marbofloxacin (Livestock) in horses, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Marbocyl, Zeniquin
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 2 mg/kg | q24h | 5-7 days | Susceptible gram-negative bacterial infection (may be insufficient for gram-positive cocci) | Moderate | Verified against Papich/Saunders Handbook of Veterinary Drugs, 4th Ed, p.501 (2026-08-01). — LOCATOR CONVENTION 2026-08-07: the bare 'p.501' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.473; verified by finding the drug named there. If you are holding the book, turn to p.473. — SOURCE EDITION: Saunders Handbook of Veterinary Drugs — ISBN 9780323244855, https://openlibrary.org/isbn/9780323244855 |
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 |
|---|---|---|---|
| 2 | IV | Papich Saunders Handbook of Veterinary Drugs, 4th edp.501 | • 2 mg/kg once daily IV or PO for treatment of susceptible gram-negative bacteria |
| 2 | — | Papich Saunders Handbook of Veterinary Drugs, 4th edp.501 | horses, the small animal dose of 2 mg/kg may not be sufficient for treating other M |
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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Fluoroquinolone that inhibits bacterial DNA gyrase and topoisomerase IV. Concentration-dependent bactericidal activity with long post-antibiotic effect.
Extra-label use in food animals restricted by FDA in US. Must be used under VCPR for extra-label use. Withdrawal periods vary by species. Not for use in dairy cattle of breeding age.
Species-specific contraindications and adverse-reaction reports for horses may differ from canine / feline reference data — consult the primary citations listed with each rule.
Marbofloxacin (Livestock) dose range in horses, with cited source references: PO 2 mg/kg q24h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Marbofloxacin (Livestock) in horses: PO.
Cited course lengths for Marbofloxacin (Livestock) in horses include: 5-7 days. Duration depends on the indication — match it to the specific dose rule in the table above.
Marbofloxacin (Livestock) is indicated in horses for: Susceptible gram-negative bacterial infection (may be insufficient for gram-positive cocci).
These are general warnings for Marbofloxacin (Livestock) across species; consult the horse dosing table above for species-specific guidance. Extra-label use in food animals restricted by FDA in US. Must be used under VCPR for extra-label use. Withdrawal periods vary by species. Not for use in dairy cattle of breeding age.
Why a species-specific page? Marbofloxacin (Livestock) pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in horses — 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.