The reference site for Metaxalone

Metaxalone (marketed by King Pharmaceuticals under the brand name Skelaxin) is a muscle relaxant used to relax muscles and relieve pain caused by strains, sprains, and other musculoskeletal conditions.

WHAT IS Metaxalone?

Metaxalone relaxes muscles and is used for short-term, painful muscular conditions in which muscles are in spasm.

It is used in addition with physical therapy and stretching of muscles. It works by blocking nerve impulses (or pain sensations) that are sent to your brain.

Metaxalone is marketed by King Pharmaceuticals under the brand name Skelaxin®. It is still under patent therefore it is still not available in a generic form.


Brand Name(s): Skelaxin
CAS nº: 1665-48-1
(me tax’ a lone)


Product Info

The sections below will provide you with more specific information and guidelines related to metaxalone and its correct use. Please read them carefully.

FDA Information

Metaxalone is commercially available as a 400 mg tablet, under the brand name Skelaxin®. This product was approved by the FDA in 1962.

The first published reports about the use of metaxalone as a skeletal muscle relaxant appeared in the 1960s. Since then it has appeared in several reviews for this purpose, the most recent of which asserts that “metaxalone has the fewest reports of side effects and no reports of major safety issues” as compared with other skeletal muscle relaxants.

Why is this medication prescribed?

Metaxalone relaxes muscles and is used for short-term, painful muscular conditions in which muscles are in spasm.

It is used along with rest and physical therapy to decrease muscle pain and spasms associated with strains, sprains or other muscle injuries. It works by blocking nerve impulses (or pain sensations) that are sent to your brain.

Other uses for this medicine

This medication has not been approved for any alternative uses other than those mentioned in the product information section.

Dosage and using this medicine

Metaxalone comes as a tablet to be taken by mouth.

Metaxalone comes in two dosages: a 400 mg tablet and an 800 mg tablet.

It usually is taken three or four times a day.

Take each dose with a full glass of water.

Take metaxalone exactly as directed. Do not take more or less of it, or take it more often than prescribed by your doctor.

What special precautions should I follow?


Tell your doctor and pharmacist if you are allergic to metaxalone or any other drugs.

Be sure to inform your doctor and pharmacist what prescription and non-prescription medications you are taking, especially medications for seizures, allergies, colds, coughs, pain relief, sedatives, tranquilizers, and vitamins.

Tell your doctor if you have or have ever had kidney disease, liver disease, seizures, or a blood disorder.

Consult your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking metaxalone, call your doctor immediately.

You should know that this drug may make you drowsy. Do not drive a car or operate machinery until you know how metaxalone affects you. Furthermore, remember that alcohol can add to the drowsiness caused by this drug.

What should I do if I forget a dose?

Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule.

Do not take a double dose to make up for a missed one.

What side effects can this medication cause?

Side effects from metaxalone may include:

drowsiness or restlessness
nausea or vomiting
stomach cramps or pain

Tell your doctor if any of these symptoms are severe or do not go away:

upset stomach

If you experience any of the following symptoms, call your doctor immediately:

severe skin rash
difficulty breathing
yellowing of the skin or eyes
unusual bruising or bleeding
unusual tiredness or weakness

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

What storage conditions are needed for this medicine?

Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom).

Throw away any medication that is outdated or no longer needed and should you have any queries, please talk to your pharmacist about the proper disposal of your medication.

In case of an emergency/overdose

In case of an overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.

Symptoms of a metaxalone overdose are unknown but might include:

low blood pressure (weakness, fainting, confusion)
severe drowsiness
decreased breathing

Product Images


Below you will find images and specific information on the principal types of metaxalone that exist, including their respective brand name(s), strength, inscription codes and manufacturers.

The information below includes general information and guidelines for patients taking this medication and should never be used to substitute professional medical advice that can be provided by a qualified physician or family doctor.


Strength(s): 400 MG
Imprint: 86 62 | C

Strength(s): 800 MG
Imprint: 86 67 | S
Manufacturer: MONARCH PHARM.

Strength(s): 800 MG
Imprint: 86 67 | S
Manufacturer: PHARMA PAC

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