Equine · Equus caballus · typical adult weight 350.00–700.00 kg
Atropine is dosed at 0.01–0.02 mg/kg IV single dose in horses, per Mogg T. Equine cardiac disease: clinical pharmacology and therapeutics. Vet Clin North Am Equine Pract. 1999;15:523-534. doi:10.1016/s0749-0739(17)30130-x — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.142 (2026-08-01). — Plumb's 10th ed (held) printed p.112, Atropine monograph spanning p.112-115; page located 2026-08-05 from the book's own running heads, verified to name the drug in its body text. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207. Atropine is used in horses for Vagal-induced bradyarrhythmia. Routes documented in horses: IV. A typical adult horse weighs 350.00–700.00 kg. ExoticRx lists 1 cited dose rule for Atropine in horses, drawn from published veterinary references. Verify against current literature before clinical use.
| Route | Dose | Frequency | Indication | Evidence | Source |
|---|---|---|---|---|---|
| IV | 0.01–0.02 mg/kg | single dose | Vagal-induced bradyarrhythmia | Strong | Mogg T. Equine cardiac disease: clinical pharmacology and therapeutics. Vet Clin North Am Equine Pract. 1999;15:523-534. doi:10.1016/s0749-0739(17)30130-x — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.142 (2026-08-01). — Plumb's 10th ed (held) printed p.112, Atropine monograph spanning p.112-115; page located 2026-08-05 from the book's own running heads, verified to name the drug in its body text. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207 |
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 |
|---|---|---|---|
| 0.02–0.04 | IM | Papich Saunders Handbook of Veterinary Drugs, 4th edp.90 | • Antidote to organophosphates or cholinesterase inhibitors: 0.02-0.04 mg/kg IM |
| 0.022 | IV | Papich Saunders Handbook of Veterinary Drugs, 4th edp.90 | • Recurrent airway obstruction (RAO): 0.022 mg/kg, once, IV. |
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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Competitive muscarinic receptor antagonist. Increases heart rate (vagolytic), reduces secretions, and mydriasis.
Tachycardia, ileus, urinary retention. Increases myocardial oxygen demand. Rabbits have high atropinase activity — may need higher/more frequent doses or use glycopyrrolate instead.
Species-specific contraindications and adverse-reaction reports for horses may differ from canine / feline reference data — consult the primary citations listed with each rule.
Atropine dose range in horses, with cited source references: IV 0.01–0.02 mg/kg single dose. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Atropine in horses: IV.
Atropine is indicated in horses for: Vagal-induced bradyarrhythmia.
These are general warnings for Atropine across species; consult the horse dosing table above for species-specific guidance. Tachycardia, ileus, urinary retention. Increases myocardial oxygen demand. Rabbits have high atropinase activity — may need higher/more frequent doses or use glycopyrrolate instead.
Why a species-specific page? Atropine 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.