Back to discover
Drug

Natalizumab

Approved · FDA / EMA
Late-stage development
Also known as Anti-VLA4, Anti-alpha4 integrin, Natalizumab (Murine), Tyruko+3 more

Anti-VLA4, Anti-alpha4 integrin, Natalizumab (Murine), Tyruko, Tysabri, IMMUNOGLOBULIN G4 (HUMAN-MOUSE MONOCLONAL AN100226 4-CHAIN ANTI-HUMAN INTEGRIN 4), DISULFIDE WITH HUMAN-MOUSE MONOCLONAL AN100226 LIGHT CHAIN, DIMER, IMMUNOGLOBULIN G4 (HUMAN-MOUSE MONOCLONAL AN100226 4-CHAIN ANTI-HUMAN INTEGRIN 4), DISULPHIDE WITH HUMAN-MOUSE MONOCLONAL AN100226 LIGHT CHAIN, DIMER.

RxNorm354770UNII3JB47N2Q2P
9
Regulatory events
Latest activity
beta

Recent clinical, regulatory, research and industry developments relating to this drug.

Natalizumab in Preventing Post-partum Relapses in Multiple Sclerosis

Clinical trial2025-01-24Results posted · ClinicalTrials.gov

Approval: Tyruko (EMA)

Regulatory2023-09-22EMA

The Role of Inflammation in Brain and Cognitive Function in Mental Disorders

Clinical trial2023-08-07Completed · ClinicalTrials.gov

Profile

Identifiers & mechanism

Canonical identifiers, marketed brand names and mechanism, resolved across RxNorm, ChEMBL and ATC.

Canonical name
Natalizumab
Aliases & brands
Anti-VLA4Anti-alpha4 integrinNatalizumab (Murine)TyrukoTysabriIMMUNOGLOBULIN G4 (HUMAN-MOUSE MONOCLONAL AN100226 4-CHAIN ANTI-HUMAN INTEGRIN 4), DISULFIDE WITH HUMAN-MOUSE MONOCLONAL AN100226 LIGHT CHAIN, DIMERIMMUNOGLOBULIN G4 (HUMAN-MOUSE MONOCLONAL AN100226 4-CHAIN ANTI-HUMAN INTEGRIN 4), DISULPHIDE WITH HUMAN-MOUSE MONOCLONAL AN100226 LIGHT CHAIN, DIMER
RxNorm CUI
354770
UNII
3JB47N2Q2P
Regulatory jurisdictions
emamhrafda

Regulatory timeline

9 events

The complete regulatory record, grouped by authority — approvals, safety advisories and label changes. Each authority shows its most recent events; expand one to read its full history.

Approval / market entry confirmed across FDA and EMA (2023-08-242023-09-22)
Earliest approval
2006-06-27
Latest approval
2026-07-23
Authorities
FDA · EMA · MHRA
Total events
9
fdaU.S. Food and Drug Administration· 4 events
2026-07-23Supplemental approval
Supplemental approval: NATALIZUMAB-SZTN (BLA761322)
Evidence ↗
2026-02-02Supplemental approval
Supplemental approval: NATALIZUMAB-SZTN (BLA761322)
Evidence ↗
2025-10-30Label change
Label change: NATALIZUMAB-SZTN (BLA761322)
Evidence ↗
emaEuropean Medicines Agency· 2 events
2023-09-22ApprovalMulti-authority
Approval: Tyruko (EMA)
Indication: Tyruko is indicated as single disease modifying therapy in adults with highly active relapsing remitting multiple sclerosis (RRMS) for the following patient groups: Patients withShow full indication

Tyruko is indicated as single disease modifying therapy in adults with highly active relapsing remitting multiple sclerosis (RRMS) for the following patient groups: Patients with highly active disease despite a full and adequate course of treatment with at least one disease modifying therapy (DMT) (for exceptions and information about washout periods see sections 4.4 and 5.1) or Patients with rapidly evolving severe RRMS defined by 2 or more disabling relapses in one year, and with 1 or more Gadolinium enhancing lesions on brain Magnetic Resonance Imaging (MRI) or a significant increase in T2 lesion load as compared to a previous recent MRI.

Evidence ↗
2006-06-27Approval
Approval: Tysabri (EMA)
Indication: Tysabri is indicated as single disease modifying therapy in adults with highly active relapsing remitting multiple sclerosis for the following patient groups: Patients withShow full indication

Tysabri is indicated as single disease modifying therapy in adults with highly active relapsing remitting multiple sclerosis for the following patient groups: Patients with highly active disease activity despite a full and adequate course of treatment with at least one disease modifying therapy (DMT) (for exceptions and information about washout periods see sections 4.4 and 5.1) or Patients with rapidly evolving severe relapsing remitting multiple sclerosis defined by 2 or more disabling relapses in one year, and with 1 or more Gadolinium enhancing lesions on brain MRI or a significant increase in T2 lesion load as compared to a previous recent MRI.

Evidence ↗
mhraMedicines and Healthcare products Regulatory Agency· 3 events
2016-04-18Safety communicationSafety
Drug Safety Update: Natalizumab (Tysabri▼): progressive multifocal leukoencephalopathy—updated advice to support early detection
Evidence ↗
2014-12-11Safety communicationSafety
Drug Safety Update: Natalizumab (Tysabri▼): risk of progressive multifocal leukoencephalopathy is increased in patients who have had previous immunosuppressant treatment
Evidence ↗
2014-12-11Safety communicationSafety
Drug Safety Update: Natalizumab (Tysabri▼): risk of progressive multifocal leukoencephalopathy increases after 2 years of therapy
Evidence ↗

Data from the U.S. Food and Drug Administration (U.S. Food and Drug Administration), public domain (CC0).

Contains information from the European Medicines Agency (European Medicines Agency), © EMA, reused under CC BY 4.0.

Contains public sector information from the Medicines and Healthcare products Regulatory Agency (MHRA) licensed under the Open Government Licence (OGL v3).

Clinical trials

47 trials

The current development programme across all trial phases — status mix, phase distribution and the late-stage studies shaping the evidence base.

Development programme
CLINICALTRIALS.GOV · LIVE REGISTRY
47
registered trials across all phases
LATEST COMPLETION 2025
25
Late-stage (III+)
33
Completed
14
Discontinued
PHASE DISTRIBUTIONn = 47
Early Phase 11Phase 15Phase 1 / 21Phase 215Phase 2 / 31Phase 310Phase 413Phase N / A1

Late-stage studies

Phase III+ trials still open or recently active — where late-stage evidence is being generated.

Recent completions

Trials that read out recently, adding to the completed evidence base.

References & data sources
  • RxNorm (U.S. National Library of Medicine) — drug identity
  • ClinicalTrials.gov — clinical trials
  • Regulatory event sources are credited in the Regulatory Timeline above.