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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: natalizumab Clear all
Completed Phase 2 Interventional Results available

Phase 2 Efficacy, Safety, and Tolerability Study of Natalizumab in Focal Epilepsy

NCT03283371
View directory record Official record
Conditions
Epilepsy, Focal Seizures, Partial Seizures
Interventions
Natalizumab, Placebo
Drug · Other
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 75 Years
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
31
States / cities
Birmingham, Alabama • Phoenix, Arizona • San Diego, California + 26 more
Source: ClinicalTrials.gov public record
Updated Dec 13, 2021 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 2 Interventional Results available

Natalizumab High Titer Immunogenicity and Safety

NCT00516893
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
BG00002-E (natalizumab high titer)
Biological
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 55 Years
Enrollment
113 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
13
States / cities
Washington D.C., District of Columbia • Maitland, Florida • Miami, Florida + 10 more
Source: ClinicalTrials.gov public record
Updated May 14, 2014 · Synced Sep 25, 2026, 10:22 PM EDT
Active, not recruiting No phase listed Observational

A Study Utilising Data From European Union (EU) National Multiple Sclerosis (MS) Registries to Assess the Incidence of Anti-Natalizumab Antibody Among Participants Who Receive Subcutaneous Administration of Natalizumab for Treatment of Relapsing-remitting Multiple Sclerosis (RRMS)

NCT05925049
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Natalizumab
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 64 Years
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 12, 2026 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Early Phase 1 Interventional

A Multicenter Study to Assess the Effect of Plasma Exchange in Accelerating the Clearance of Natalizumab in Subjects With Multiple Sclerosis (MS)

NCT00424788
View directory record Official record
Conditions
Relapsing Forms of Multiple Sclerosis
Interventions
Plasma exchange, natalizumab treatment
Procedure · Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 50 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007
U.S. locations
2
States / cities
Cleveland, Ohio • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 3, 2009 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 2 Interventional

Safety and Efficacy of Natalizumab in Combination With Remicade in the Treatment of Crohn's Disease

NCT00055536
View directory record Official record
Conditions
Crohn's Disease
Interventions
natalizumab
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2003
U.S. locations
18
States / cities
Gainesville, Florida • Jacksonville, Florida • Atlanta, Georgia + 14 more
Source: ClinicalTrials.gov public record
Updated Jun 15, 2016 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 2 Interventional Results available

Effect of Natalizumab on Infarct Volume in Acute Ischemic Stroke

NCT01955707
View directory record Official record
Conditions
Acute Ischemic Stroke
Interventions
natalizumab, Placebo
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 85 Years
Enrollment
161 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
19
States / cities
San Diego, California • Gainesville, Florida • Kansas City, Kansas + 16 more
Source: ClinicalTrials.gov public record
Updated Jun 30, 2016 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 3 Interventional

A Clinical Trial of Natalizumab in Individuals With Moderately to Severely Active Crohn's Disease

NCT00078611
View directory record Official record
Conditions
Crohn's Disease
Interventions
natalizumab
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years and older
Enrollment
462 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2005
U.S. locations
63
States / cities
Oro Valley, Arizona • Tucson, Arizona • Anaheim, California + 54 more
Source: ClinicalTrials.gov public record
Updated Jun 15, 2016 · Synced Sep 25, 2026, 10:22 PM EDT
Withdrawn Phase 1Phase 2 Interventional

Natalizumab in Recurrent, Refractory or Progressive Pulmonary Metastatic Osteosarcoma

NCT03811886
View directory record Official record
Conditions
Pulmonary Metastatic Osteosarcoma (pOS)
Interventions
Natalizumab
Drug
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
5 Years to 30 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 14, 2025 · Synced Sep 25, 2026, 10:22 PM EDT
Terminated Phase 4 Interventional Results available

Corticosteroids for Immune Reconstitution Inflammatory Syndrome (IRIS)

NCT01211665
View directory record Official record
Conditions
Immune Reconstitution Inflammatory Syndrome, Leukoencephalopathy, Progressive Multifocal
Interventions
Methylprednisolone, Prednisolone
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Hastings, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 4, 2014 · Synced Sep 25, 2026, 10:22 PM EDT
Completed No phase listed Observational

Observational Study of Tysabri in Early Relapsing-Remitting Multiple Sclerosis in Anti-JC Virus Antibody Negative Participants

NCT01485003
View directory record Official record
Conditions
Relapsing-Remitting Multiple Sclerosis
Interventions
natalizumab
Biological
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 65 Years
Enrollment
231 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2018
U.S. locations
44
States / cities
Homewood, Alabama • Sun City, Arizona • La Jolla, California + 39 more
Source: ClinicalTrials.gov public record
Updated Feb 11, 2019 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 3 Interventional Results available

Natalizumab Re-Initiation of Dosing

NCT00306592
View directory record Official record
Conditions
Multiple Sclerosis, Relapsing-Remitting
Interventions
BG00002 (natalizumab)
Biological
Lead sponsor
Biogen
Industry
Eligibility
18 Years and older
Enrollment
404 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
53
States / cities
Birmingham, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 46 more
Source: ClinicalTrials.gov public record
Updated Mar 20, 2017 · Synced Sep 25, 2026, 10:22 PM EDT
Terminated Phase 3 Interventional Results available

Efficacy and Safety of Daclizumab in Participants With RRMS Switching From Natalizumab

NCT02881567
View directory record Official record
Conditions
Relapsing-Remitting Multiple Sclerosis (RRMS)
Interventions
Daclizumab
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 55 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
3
States / cities
Tampa, Florida • Des Moines, Iowa • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 26, 2019 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 4 Interventional Results available

Sequential Natalizumab - Alemtuzumab Therapy in Patients With Relapsing Forms of Multiple Sclerosis

NCT03135249
View directory record Official record
Conditions
Multiple Sclerosis (MS)
Interventions
Alemtuzumab
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
2
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Feb 14, 2022 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 1 Interventional

Safety Study of Natalizumab to Treat Multiple Sclerosis (MS)

NCT00559702
View directory record Official record
Conditions
Relapsing-Remitting Multiple Sclerosis, Secondary Progressive Multiple Sclerosis
Interventions
natalizumab, standard of care
Drug · Other
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 65 Years
Enrollment
76 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
12
States / cities
Phoenix, Arizona • Scottsdale, Arizona • Berkeley, California + 9 more
Source: ClinicalTrials.gov public record
Updated Sep 8, 2014 · Synced Sep 25, 2026, 10:22 PM EDT
Completed No phase listed Observational

Pharmacokinetic, Immunological and Biochemical Sample Collection and Analysis of a Tysabri Patient Cohort

NCT01070719
View directory record Official record
Conditions
Multiple Sclerosis, Relapse
Interventions
Not listed
Lead sponsor
John F. Foley, MD
Other
Eligibility
18 Years to 75 Years
Enrollment
270 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Feb 29, 2012 · Synced Sep 25, 2026, 10:22 PM EDT
Completed No phase listed Observational

Evaluation of Natalizumab for thE Relief of MS Associated FatiGue

NCT00464074
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Not listed
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 55 Years
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
30
States / cities
Phoenix, Arizona • Fresno, California • Atlanta, Georgia + 25 more
Source: ClinicalTrials.gov public record
Updated Aug 21, 2023 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 3 Interventional

Safety and Efficacy of Natalizumab in Combination With Avonex in the Treatment of Multiple Sclerosis

NCT00030966
View directory record Official record
Conditions
Multiple Sclerosis, Relapsing-Remitting
Interventions
Natalizumab, Placebo
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 55 Years
Enrollment
1,200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2005
U.S. locations
72
States / cities
Birmingham, Alabama • Phoenix, Arizona • Little Rock, Arkansas + 59 more
Source: ClinicalTrials.gov public record
Updated Jun 17, 2009 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 4 Interventional

A Pharmacokinetic (PK) Study of Natalizumab (Tysabri) at Steady State

NCT00744679
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Natalizumab
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 55 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
1
States / cities
Latham, New York
Source: ClinicalTrials.gov public record
Updated Feb 9, 2015 · Synced Sep 25, 2026, 10:22 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Does Long-Term Natalizumab (NTZ) Therapy Normalize Brain Atrophy Rates and Quality of Life (QOL) in Relapsing Remitting Multiple Sclerosis (RRMS)?

NCT02588053
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Not listed
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 55 Years
Enrollment
85 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2019
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 16, 2019 · Synced Sep 25, 2026, 10:22 PM EDT
Completed No phase listed Observational

TYSABRI Global Observational Program in Safety

NCT00477113
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Not listed
Lead sponsor
Biogen
Industry
Eligibility
Not listed
Enrollment
2,207 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2015
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 21, 2015 · Synced Sep 25, 2026, 10:22 PM EDT
Completed No phase listed Observational

Pregnancy Exposure Registry for Tysabri®

NCT00472992
View directory record Official record
Conditions
Crohn's Disease, Prenatal Exposure, Multiple Sclerosis, Pregnancy
Interventions
Not listed
Lead sponsor
Biogen
Industry
Eligibility
Female only
Enrollment
376 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Aug 10, 2014 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 3 Interventional

Safety and Efficacy of Natalizumab in the Treatment of Crohn's Disease

NCT00032799
View directory record Official record
Conditions
Crohn's Disease
Interventions
natalizumab
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years and older
Enrollment
905 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2003
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Jun 15, 2016 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Not applicable Interventional Results available

The Effect of Natalizumab (Tysabri) on Sexual Dysfunction in Multiple Sclerosis

NCT01455220
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Tysabri ® (Natalizumab)
Drug
Lead sponsor
University of South Florida
Other
Eligibility
18 Years to 60 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Mar 30, 2017 · Synced Sep 25, 2026, 10:22 PM EDT
Completed No phase listed Observational

A Study of MSDx Complex 1 as a Marker for Therapy Response in Multiple Sclerosis

NCT01541618
View directory record Official record
Conditions
Relapsing Remitting Multiple Sclerosis
Interventions
MSDX Complex-1 Biomarker test
Other
Lead sponsor
MSDx, Inc.
Industry
Eligibility
45 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Sep 1, 2020 · Synced Sep 25, 2026, 10:22 PM EDT