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

Metaxalone is a prescription muscle relaxant that has been used in the United States since 1962. You may know it by its brand name, Skelaxin. It's prescribed to relieve the pain and discomfort of acute musculoskeletal conditions — things like pulled muscles, back spasms, and sports injuries — as part of a broader treatment plan that typically includes rest, physical therapy, and other measures.

This article covers everything you need to know about Metaxalone: what it is, what it treats, how it works, how it's taken, and what sets it apart from other muscle relaxants.

What Is Metaxalone?

Metaxalone is a centrally acting skeletal muscle relaxant. "Centrally acting" means it works through the brain and central nervous system (CNS) rather than directly on the muscles. The brand name is Skelaxin, which was originally manufactured by King Pharmaceuticals and is now marketed by Pfizer. Multiple generic manufacturers also produce it.

Metaxalone was FDA-approved in 1962, making it one of the older muscle relaxants still in common use. Despite its age, it remains popular because of a key differentiator: compared to similar drugs like cyclobenzaprine or carisoprodol, Metaxalone tends to cause significantly less drowsiness — a major advantage for patients who need to function during the day.

What Does Metaxalone Treat?

The FDA-approved indication for Metaxalone is as an adjunct to rest, physical therapy, and other measures for the relief of discomfort associated with acute, painful musculoskeletal conditions. In plain English, it's prescribed for short-term muscle pain caused by conditions such as:

• Muscle strains and sprains
• Acute low back pain with muscle spasm
• Neck pain with muscle tension
• Sports injuries with muscle involvement
• Post-surgical muscle pain and spasm

It is NOT FDA-approved for chronic musculoskeletal conditions, fibromyalgia, or neurological spasticity — though doctors may occasionally prescribe it off-label for related conditions.

What Forms Does Metaxalone Come In?

Metaxalone is available exclusively as an oral tablet. There is no injection, liquid, or extended-release formulation. Two tablet strengths exist:

• 800 mg tablets: The original and most commonly prescribed strength. Available as brand-name Skelaxin and multiple generics.
• 640 mg tablets: A newer generic-only formulation. Importantly, these are NOT interchangeable with 800 mg tablets on a milligram-for-milligram basis. Different bioavailability, different dosing math. Don't try to substitute one for the other.

What Is the Typical Dosage?

The standard dosage of Metaxalone for adults and children 13 years of age and older is:

800 mg, taken three to four times daily.

This works out to a maximum of 3,200 mg per day (four doses of 800 mg). Your doctor may prescribe three times daily (2,400 mg/day) if that's sufficient for your pain level. Always follow your prescription label — don't take more than prescribed, as higher doses increase the risk of serotonin syndrome.

Metaxalone is not recommended for children under 13. The safety and efficacy have not been established in this population.

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With Food or Without?

Metaxalone can be taken with or without food, but the food question matters more for this drug than for most. Taking Metaxalone with a full meal significantly increases how much of the drug is absorbed into your bloodstream. This can intensify its CNS effects — making you more drowsy or dizzy. The key rule: be consistent. If you start taking it with food, keep doing that. If you take it on an empty stomach, maintain that habit. Don't switch back and forth.

How Long Should You Take Metaxalone?

Metaxalone is intended for short-term use with acute conditions. Most prescriptions are written for 7–14 days. It's not designed for chronic or long-term use. If your pain persists beyond the prescribed period, contact your doctor rather than continuing to take Metaxalone on your own.

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Is Metaxalone a Controlled Substance?

No. Metaxalone is not a DEA-scheduled controlled substance. This distinguishes it from carisoprodol (Soma), which is a Schedule IV controlled substance. The non-controlled status of Metaxalone means it can be prescribed via telehealth, refilled without special requirements, and is generally easier to access than controlled muscle relaxants.

How Does It Compare to Other Muscle Relaxants?

vs. Cyclobenzaprine: Metaxalone causes less sedation; cyclobenzaprine is cheaper but more anticholinergic

vs. Methocarbamol: Similar sedation profiles; methocarbamol is significantly cheaper ($8–$30 vs. $20–$25 with coupons)

vs. Carisoprodol (Soma): Metaxalone is not a controlled substance; carisoprodol has higher abuse potential and is Schedule IV

vs. Tizanidine: Tizanidine is an alpha-2 agonist with a different mechanism; requires liver monitoring; better for spasticity

What to Discuss With Your Doctor Before Taking Metaxalone

Tell your doctor if you have history of liver or kidney disease; any history of anemia (especially hemolytic); current medications — particularly antidepressants (SSRIs, SNRIs, TCAs), opioids, or MAO inhibitors that can interact; whether you are pregnant, planning to become pregnant, or breastfeeding; and any known drug allergies.

Finding Metaxalone Near You

Once you have a prescription, medfinder can help you find a pharmacy near you that has it in stock. Simply enter your medication, dosage, and ZIP code — medfinder calls local pharmacies and texts you the results.