ExoticRx · exoticrx.com/drugs/methocarbamol-injectable
US brand names:Robaxin-V Injectable
Methocarbamol Injectable is dosed at 44–150 mg/kg IV Slow IV to effect; may repeat in cats, per ROBAXIN-V INJECTION - Methocarbamol Injectable and Tablets [US Product Label for Dogs, Cats, and Horses]. Fort Dodge; 2003. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=090a3d3d-92c3-4c30-a648-436461f81702 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.882 (2026-08-01).. Verify against current literature before clinical use.
Centrally acting muscle relaxant that depresses polysynaptic reflexes in the spinal cord and subcortical areas, reducing skeletal muscle hypertonicity and spasm.
IV route for acute severe muscle spasm (tetanus, strychnine toxicity, metaldehyde). Administer slowly to avoid seizures. Sedation and ataxia expected. Do not exceed 330mg/kg/day.
Species references:All Cat (Domestic) drugsAll Dog (Domestic) drugs
Each ExoticRx dose rule is graded by the strength of its primary evidence — see the editorial process.
A dog/cat sample is shown here. Cited dosing for all 2 species — reptiles, birds, pocket pets, livestock, and equine — is free on the per-species pages above. Pro adds the weight-based calculator for every species.
| Species | Route | Dose | Frequency | Evidence | Source |
|---|---|---|---|---|---|
| Cat (Domestic) | IV | 44–150 mg/kg | Slow IV to effect; may repeat | Strong | ROBAXIN-V INJECTION - Methocarbamol Injectable and Tablets [US Product Label for Dogs, Cats, and Horses]. Fort Dodge; 2003. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=090a3d3d-92c3-4c30-a648-436461f81702 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.882 (2026-08-01). |
| Dog (Domestic) | IV | 44–220 mg/kg | Slow IV to effect; q8-12h, max 330 mg/kg/day | Strong | Plumb's Veterinary Drug Handbook, 9th Ed, p.855 (corpus PDF p.882) — Methocarbamol, Dosages, DOGS/CATS, Injectable label dosage and extra-label tremorgenic-toxicity paragraph |
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View PlansSource citations and evidence levels available on the live page. Reference only — verify against current literature before clinical use.