Cat · Felis catus · typical adult weight 2.50–7.00 kg
Methocarbamol Injectable is dosed at 44–150 mg/kg IV Slow IV to effect; may repeat in cats, per Plumb's Veterinary Drug Handbook, 10th ed, Methocarbamol monograph, corpus PDF p.882. DOGS/CATS (label dosage, FDA-approved): Injectable - "For relief of moderate conditions: 44 mg/kg IV initial dose"; "For controlling severe effects of strychnine and tetanus: 55 - 220 mg/kg IV initial dose... The […]" Oral (tablets) - "132 mg/kg PO on Day 1 in 2 or 3 equally divided doses (ie, every 8 to 12 hours), then 66 - 132 […]" DOGS, intervertebral disk disease (extra-label): "Anecdotal dosages of 15 - 20 mg/kg PO every 8 hours are usually noted." HORSES (label dosage, FDA-approved): "For moderate conditions: 4.4 - 22 mg/kg IV to effect"; "For severe conditions (tetanus): 22 - 55 mg/kg IV". — SOURCE ROWS: Plumb's Veterinary Drug Handbook, Methocarbamol monograph, corpus p.882, DOGS/CATS (label dosage, FDA-approved), Injectable — "i. For relief of moderate conditions: 44 mg/kg IV initial dose. ii. For controlling severe effects […]" — RETRIEVED FINDING - CHANGE REQUIRED (retrieved 2026-08-19): Initially, 40 - 50 mg/kg IV slowly over 3 to 5 minutes to clinical effect (ie, resolution or near-resolution of clinical signs). Repeat as necessary or follow with a CRI at an initial rate of 10 mg/kg/hour IV. — Plumb's Veterinary Drug Handbook 10th ed, Methocarbamol, printed p.855 / corpus p.882 | ORIGINAL SOURCE THE BOOK CITES (2026-08-20): the dose row carries superscript 4 — "44 mg/kg IV initial dose4 should be used in nursing dams.9" — which resolves in the monograph's own reference list to: ROBAXIN-V INJECTION - Methocarbamol Injectable and Tablets [US Product Label for Dogs, Cats, and Horses]. Fort Dodge; 2003. This records what the handbook attributes the figure to. It is NOT a statement that the reference was read or that it validates the dose.. Methocarbamol Injectable is used in cats for Permethrin toxicity (muscle tremors). Routes documented in cats: IV. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 1 cited dose rule for Methocarbamol Injectable in cats, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Robaxin-V Injectable
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| IV | 44–150 mg/kg | Slow IV to effect; may repeat | Give to effect; combine with ILE for permethrin toxicity; max 330mg/kg/day | Permethrin toxicity (muscle tremors) | Strong | Plumb's Veterinary Drug Handbook, 10th ed, Methocarbamol monograph, corpus PDF p.882. DOGS/CATS (label dosage, FDA-approved): Injectable - "For relief of moderate conditions: 44 mg/kg IV initial dose"; "For controlling severe effects of strychnine and tetanus: 55 - 220 mg/kg IV initial dose... The […]" Oral (tablets) - "132 mg/kg PO on Day 1 in 2 or 3 equally divided doses (ie, every 8 to 12 hours), then 66 - 132 […]" DOGS, intervertebral disk disease (extra-label): "Anecdotal dosages of 15 - 20 mg/kg PO every 8 hours are usually noted." HORSES (label dosage, FDA-approved): "For moderate conditions: 4.4 - 22 mg/kg IV to effect"; "For severe conditions (tetanus): 22 - 55 mg/kg IV". — SOURCE ROWS: Plumb's Veterinary Drug Handbook, Methocarbamol monograph, corpus p.882, DOGS/CATS (label dosage, FDA-approved), Injectable — "i. For relief of moderate conditions: 44 mg/kg IV initial dose. ii. For controlling severe effects […]" — RETRIEVED FINDING - CHANGE REQUIRED (retrieved 2026-08-19): Initially, 40 - 50 mg/kg IV slowly over 3 to 5 minutes to clinical effect (ie, resolution or near-resolution of clinical signs). Repeat as necessary or follow with a CRI at an initial rate of 10 mg/kg/hour IV. — Plumb's Veterinary Drug Handbook 10th ed, Methocarbamol, printed p.855 / corpus p.882 | ORIGINAL SOURCE THE BOOK CITES (2026-08-20): the dose row carries superscript 4 — "44 mg/kg IV initial dose4 should be used in nursing dams.9" — which resolves in the monograph's own reference list to: ROBAXIN-V INJECTION - Methocarbamol Injectable and Tablets [US Product Label for Dogs, Cats, and Horses]. Fort Dodge; 2003. This records what the handbook attributes the figure to. It is NOT a statement that the reference was read or that it validates the dose. |
Every held source for this drug and species, as printed. Where they differ, both are shown — the choice is yours, not ours.
The sources disagree for this combination. The ranges below do not overlap on a comparable route. This is not an error in one of them — published veterinary references differ, and reconciling them for a particular patient is a clinical judgement.
| Dose (mg/kg) | Route | Source | As printed |
|---|---|---|---|
| 20–45 | PO | BSAVA Small Animal Formulary, 10th ed — Part A (Canine and Feline)p.273 | 20-45 mg/kg p.o. q8h. Very high doses may be required for tetanus. It is recommended that the dose do |
| 330 | PO | BSAVA Small Animal Formulary, 10th ed — Part A (Canine and Feline)p.273 | or tetanus. It is recommended that the dose does not exceed 330 mg/kg, although serious toxicity or death has not been reported after overdoses. |
| 44 | PO | Papich Saunders Handbook of Veterinary Drugs, 4th edp.537 | • 44 mg/kg q8h PO or IV on the first day, and then 22-44 mg/kg q8h PO. Up to |
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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-specific contraindications and adverse-reaction reports for cats may differ from canine / feline reference data — consult the primary citations listed with each rule.
Methocarbamol Injectable dose range in cats, with cited source references: IV 44–150 mg/kg Slow IV to effect; may repeat. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Methocarbamol Injectable in cats: IV.
Cited course lengths for Methocarbamol Injectable in cats include: Give to effect; combine with ILE for permethrin toxicity; max 330mg/kg/day. Duration depends on the indication — match it to the specific dose rule in the table above.
Methocarbamol Injectable is indicated in cats for: Permethrin toxicity (muscle tremors).
These are general warnings for Methocarbamol Injectable across species; consult the cat dosing table above for species-specific guidance. 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.
Why a species-specific page? Methocarbamol Injectable pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in cats — 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.
| 22–44 | PO | Papich Saunders Handbook of Veterinary Drugs, 4th edp.537 | • 44 mg/kg q8h PO or IV on the first day, and then 22-44 mg/kg q8h PO. Up to |
| 130 | — | Papich Saunders Handbook of Veterinary Drugs, 4th edp.537 | 130 mg/kg for severe conditions. |
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.