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In the US, Metaxalone (metaxalone systemic) is a member of the drug class skeletal muscle relaxants and is used to treat Fibromyalgia and Muscle Spasm.

US matches:



CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Category

Muscle relaxant

Chemical Name

2-Oxazolidinone, 5-[(3,5-dimetylphenoxy)metyl]-

Foreign Names

  • Metaxalonum (Latin)
  • Metaxalon (German)
  • Métaxalone (French)
  • Metaxalona (Spanish)

Generic Names

  • Metaxalone (OS: USAN, BAN)
  • AHR 438 (IS: Robins)

Brand Names

  • Fenaplus-RX (Metaxalone and Diclofenac)
    Modi Mundi, India
  • Metadol (Metaxalone and Diclofenac)
    East West, India
  • Skelaxin
    King Pharmaceuticals, United States

International Drug Name Search


BANBritish Approved Name
ISInofficial Synonym
OSOfficial Synonym
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
USANUnited States Adopted Name

Click for further information on drug naming conventions and International Nonproprietary Names.

Important Notice: The international database is in BETA release. This means it is still under development and may contain inaccuracies. It is not intended as a substitute for the expertise and judgement of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that the use of any medication in any country is safe, appropriate or effective for you. Consult with your healthcare professional before taking any medication.