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Methocarbamol (Equine Injectable) for Horse

Equine · Equus caballus · typical adult weight 350.00–700.00 kg

Methocarbamol (Equine Injectable) is used in horse for Muscle spasm, rhabdomyolysis (tying up), Exertional rhabdomyolysis (tying up), muscle spasm. Routes documented in horse: IV. A typical adult horse weighs 350.00–700.00 kg. ExoticRx lists 2 cited dose rules for Methocarbamol (Equine Injectable) in horse, drawn from published veterinary references. Verify against current literature before clinical use.

Trade names: Robaxin-V

Dose ranges

RouteDoseFrequencyDurationIndicationEvidenceSource
IV4.4–22 mg/kgq12-24h or to effectMuscle spasm, rhabdomyolysis (tying up)ModeratePlumb's Veterinary Drug Handbook, 9th Ed
IV4.4–22 mg/kgq8-12h1-3 treatmentsExertional rhabdomyolysis (tying up), muscle spasmStrongFDA NADA Label

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Mechanism of action

Centrally-acting skeletal muscle relaxant that depresses multisynaptic reflex arcs. Does not directly relax skeletal muscle or depress the neuromuscular junction.

Side effects & warnings

For horses and cattle. IV injection only — administer slowly (not more than 2ml/min per kg BW). May cause sedation, salivation, and ataxia. Do not use in animals with known renal impairment.

Species-specific contraindications and adverse-reaction reports for horse may differ from canine / feline reference data — consult the primary citations listed with each rule.

Other Neurological drugs with horse dosing

Methocarbamol (Equine Injectable) dosing in other species

Why a species-specific page? Methocarbamol (Equine Injectable) pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in horse — 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.