Pain & arthritis Dogs & Cats

Methocarbamol for dogs and cats

A muscle relaxant for muscle spasms from injury, inflammation, disc disease and some poisonings. [1]

Last reviewed: October 2026 · 2 sources · see sources

Quick answerMethocarbamol is a prescription medicine for dogs and cats. It acts on the nervous system to calm muscle spasms. The most common side effects: sleepiness, drooling, vomiting, weakness and wobbliness.

Key facts

Generic nameMethocarbamol
Common brand namesRobaxin
Used inDogs & Cats
TypePain & arthritis
Prescription?Prescription
Typical US priceNot listed (no reliable public source)

What it's used for

A muscle relaxant for muscle spasms from injury, inflammation, disc disease and some poisonings. [1]

How it works

It acts on the nervous system to calm muscle spasms. [1]

Side effects and cautions

Common side effects: Sleepiness, drooling, vomiting, weakness and wobbliness. Urine can turn dark or blue-green, which is harmless. [1]

Use with care: Use caution in pets with kidney disease. Tell your vet about other sedating medicines. [1]

Call your vet right away if your pet has trouble breathing, facial swelling, hives, collapse, or any side effect that is severe or getting worse.

About dosingDosing is your vet's call. We don't list doses because the right amount depends on your pet's weight, age, health and other medicines. Don't change a dose or stop a medicine without asking your vet, and never give a pet medicine meant for people unless your vet tells you to [2].

What it costs

We don't list a price for this one because we couldn't find a reliable public source. Ask your vet or pharmacy for a quote; prices depend on your pet's size, the dose and where you fill it.

Methocarbamol FAQ

What is Methocarbamol used for in dogs and cats?

A muscle relaxant for muscle spasms from injury, inflammation, disc disease and some poisonings.

What are the side effects of Methocarbamol?

Sleepiness, drooling, vomiting, weakness and wobbliness. Urine can turn dark or blue-green, which is harmless.

Does Methocarbamol need a prescription?

Yes. It needs a prescription from a veterinarian.

How much Methocarbamol should I give my pet?

Only your veterinarian can tell you. The right dose depends on your pet's weight, health and other medicines, so we don't list doses. Never give a pet a medicine prescribed for a person or another animal without asking your vet.

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This page is general information for pet owners, not veterinary advice. Talk to your vet about your own pet.

Sources (2) — tap to show
  1. VCA Animal Hospitals – Methocarbamol (veterinary drug handout)
  2. FDA – Frequently asked questions about animal drugs