Skip to Content


In the US, Natalizumab (natalizumab systemic) is a member of the drug class selective immunosuppressants and is used to treat Crohn's Disease - Maintenance and Multiple Sclerosis.

US matches:



ATC (Anatomical Therapeutic Chemical Classification)


CAS registry number (Chemical Abstracts Service)


Therapeutic Categories

Selective immunosuppressant

Monoclonal antibody

Alpha-4 integrin inhibitor

Chemical Names

Immunoglobulin G4 (human-mouse monoclonal AN 100226 4-chain anti-human integrin 4), disulfide wit human-mouse monoclonal AN100226 light chain, dimer (WHO)

Immunoglobulin G4, anti- (human integrin alpha4) (human-mouse monoclonal AN100226 gamm4-chain), disulfide wit human-mouse monoclonal AN100226 light chain, dimer

Foreign Names

  • Natalizumabum (Latin)
  • Natalizumab (German)
  • Natalizumab (French)
  • Natalizumab (Spanish)

Generic Names

  • Natalizumab (OS: USAN, BAN)
  • AN 100226 (IS: Biogen)
  • Antegren (IS)

Brand Names

  • Tysabri
    Biogen, Australia; Biogen, Belgium; Biogen, Canada; Biogen, Germany; Biogen, Denmark; Biogen, Spain; Biogen, France; Biogen, Hungary; Biogen, Ireland; Biogen, Israel; Biogen, Netherlands; Biogen Dompé, Italy; Biogen Idec, Austria; Biogen Idec, Bosnia & Herzegowina; Biogen Idec, United Kingdom; Biogen Idec, Hong Kong; Biogen Idec, Norway; Biogen Idec, New Zealand; Biogen Idec, Poland; Biogen Idec, Serbia; Biogen Idec, United States; Biogen Idec Limited, Greece; Biogen Japan, Japan; Biogen Switzerland, Switzerland; BiogenIdec, Sweden; Elan, Iceland; Elan, Lithuania; Elan, Portugal; Elan, Romania; Elan, Tunisia; Elan Pharma, Czech Republic; Elan Pharma, Oman; Gedeon Richter, Latvia; Haemato Pharm, Austria; Medis Adria, Croatia (Hrvatska); Pharmaplan, South Africa; Stendhal, Mexico; Vetter, Georgia


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

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.