What Is Methocarbamol? Uses, Dosage, and What You Need to Know in 2026

Methocarbamol is a prescription muscle relaxant that has been helping patients relieve muscle pain and spasms for nearly 70 years. Whether your doctor just prescribed it or you want to understand what's in your medicine cabinet, this guide covers everything you need to know about Methocarbamol — in plain English.

What Is Methocarbamol?

Methocarbamol is a centrally-acting skeletal muscle relaxant. The brand name is Robaxin. It was first FDA-approved on July 16, 1957, making it one of the oldest and most established muscle relaxants on the market. In 2023, it was the 121st most commonly prescribed medication in the United States, with more than 5 million prescriptions written annually.

Methocarbamol is available as a generic (very affordable) and was previously sold under the brand name Robaxin (the brand-name product was discontinued by its manufacturer in January 2020, but the generic is widely available).

What Is Methocarbamol Used For?

The FDA-approved indication for Methocarbamol is as an adjunct to rest, physical therapy, and other measures for the relief of discomfort associated with acute, painful musculoskeletal conditions.

In plain terms, that means it's prescribed for:

Acute lower back pain and back spasms

Neck pain and cervical muscle spasm

Muscle strains and sprains

Sports injuries involving muscles

Post-surgical or post-procedure muscle pain

Tetanus (injectable form only — a special use case)

Methocarbamol is intended for short-term use, typically 2-3 weeks, as part of a broader treatment plan that includes rest, physical therapy, and other pain management approaches.

What Are the Available Forms and Doses?

Methocarbamol comes in:

Oral tablets: 500 mg and 750 mg strengths

Injectable solution: 100 mg/mL (for IV or IM use in hospital/clinic settings only)

Typical oral dosing for adults:

First 48-72 hours: 1,500 mg four times daily (6 g/day); up to 8 g/day for severe conditions

Maintenance: Reduced to 4,000-4,500 mg/day in 3-4 divided doses

Onset: Effects begin approximately 30 minutes after an oral dose

Half-life: 1-2 hours (meaning the drug clears the body relatively quickly)

Always take Methocarbamol exactly as prescribed. Taking it with food can reduce stomach upset.

Is Methocarbamol a Controlled Substance?

No. Methocarbamol is not a DEA-scheduled controlled substance. This is an important distinction compared to some other muscle relaxants — for example, carisoprodol (Soma) is Schedule IV, meaning it has recognized abuse potential and requires additional prescribing restrictions. Methocarbamol carries no such designation and can be prescribed more freely, including via telehealth.

Key Safety Points to Know

Avoid alcohol: Methocarbamol is a CNS depressant. Combining it with alcohol significantly increases sedation risk.

Avoid driving: Until you know how it affects you, do not drive or operate heavy machinery.

Tell your doctor about all medications: Opioids, benzodiazepines, sleep aids, and other CNS depressants can cause dangerous interactions.

Older adults: Adults 65+ are at higher risk for falls and confusion. Discuss this with your doctor.

Lab tests: Tell your lab if you're taking Methocarbamol — it can interfere with certain urine screening tests.

How Does Methocarbamol Compare to Other Muscle Relaxants?

Compared to cyclobenzaprine (the most commonly prescribed muscle relaxant), Methocarbamol tends to cause less sedation and fewer anticholinergic side effects. Compared to carisoprodol (Soma), it has a much lower abuse potential and is not a controlled substance. For a full comparison with other options, see our guide: Alternatives to Methocarbamol.

Where to Find Methocarbamol

Methocarbamol is available at most pharmacies, though localized stock issues can occur. If your usual pharmacy is out of stock, use medfinder to check which pharmacies near you have it available — without having to make multiple phone calls.