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In some countries, this medicine may only be approved for veterinary use.

In the US, Oxacillin (oxacillin systemic) is a member of the drug class penicillinase resistant penicillins and is used to treat Bacterial Infection, Bone infection, Endocarditis, Joint Infection, Meningitis, Pneumonia, Septicemia, Sinusitis and Skin or Soft Tissue Infection.

US matches:



ATC (Anatomical Therapeutic Chemical Classification)


CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Category

Beta-lactam antibacterial: Beta-lactamase resistant penicillin

Chemical Name

4-tia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, 3,3-dimetyl-6-[[(5-metyl-3-phenyl-4-isoxazolyl)carbonyl]amino]-7-oxo-, [2S-(2α,5α,6β)]-

Foreign Names

Generic Names

  • Oxacillin (OS: BAN)
  • Oxacilline (OS: DCF)
  • AB 1400 (IS)
  • BRL 1400 (IS)
  • Oxazocilline (IS)
  • Oxacillin Sodium (OS: USAN, BANM, JAN)
  • P 12 (IS)
  • SQ 16423 (IS)
  • Oxacillin Sodium (PH: USP 38)
  • Oxacillin Sodium Monohydrate (PH: BP 2016)
  • Oxacillin sodium monohydrate (PH: Ph. Eur. 8)
  • Oxacillinum natricum monohydricum (PH: Ph. Eur. 8)

Brand Names


BANBritish Approved Name
BANMBritish Approved Name (Modified)
DCFDénomination Commune Française
ISInofficial Synonym
JANJapanese Accepted Name
OSOfficial Synonym
PHPharmacopoeia Name
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
USANUnited States Adopted Name

Further information on drug naming conventions: 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.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.