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Showing 1–24 of 64 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: natalizumab treatment Clear all
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 28, 2026, 7:07 PM EDT
Terminated Phase 2 Interventional Results available

Natalizumab in the Treatment of Rheumatoid Arthritis in Subjects Receiving Methotrexate

NCT00083759
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
natalizumab, placebo
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 75 Years
Enrollment
299 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2004
U.S. locations
10
States / cities
Birmingham, Alabama • Tucson, Arizona • Escondido, California + 7 more
Source: ClinicalTrials.gov public record
Updated Jul 17, 2016 · Synced Sep 28, 2026, 7:07 PM EDT
Active, not recruiting Phase 4 Interventional

Cladribine Tablets After Treatment With Natalizumab (CLADRINA)

NCT04178005
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Cladribine
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
2
States / cities
Overland Park, Kansas • Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Dec 7, 2025 · Synced Sep 28, 2026, 7:07 PM EDT
Completed Phase 3 Interventional

Safety and Efficacy of Natalizumab in the Treatment of Multiple Sclerosis

NCT00027300
View directory record Official record
Conditions
Multiple Sclerosis, Relapsing-Remitting
Interventions
Natalizumab, Placebo
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 50 Years
Enrollment
900 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2005
U.S. locations
14
States / cities
Scottsdale, Arizona • Berkeley, California • Davis, California + 11 more
Source: ClinicalTrials.gov public record
Updated Jan 8, 2017 · Synced Sep 28, 2026, 7:07 PM EDT
Completed Phase 2 Interventional Results available

Stem Cell Therapy for Patients With Multiple Sclerosis Failing Alternate Approved Therapy- A Randomized Study

NCT00273364
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Hematopoietic Stem Cell Therapy, Standard treatment with a conventional drug
Procedure · Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 55 Years
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2019
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 11, 2020 · Synced Sep 28, 2026, 7:07 PM EDT
Recruiting Phase 3 Interventional

Best Available Therapy Versus Autologous Hematopoietic Stem Cell Transplant for Multiple Sclerosis (BEAT-MS)

NCT04047628
View directory record Official record
Conditions
Relapsing Multiple Sclerosis, Relapsing Remitting Multiple Sclerosis, Secondary Progressive Multiple Sclerosis
Interventions
Autologous Hematopoietic Stem Cell Transplantation, Best Available Therapy (BAT)
Procedure · Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 55 Years
Enrollment
156 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2029
U.S. locations
23
States / cities
Palo Alto, California • Aurora, Colorado • Evanston, Illinois + 18 more
Source: ClinicalTrials.gov public record
Updated Sep 15, 2026 · Synced Sep 28, 2026, 7:07 PM EDT
Terminated Phase 1Phase 2 Interventional Results available

Study of Natalizumab in Relapsed/Refractory Multiple Myeloma

NCT00675428
View directory record Official record
Conditions
Multiple Myeloma
Interventions
BG00002 (natalizumab)
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
2
States / cities
Scottsdale, Arizona • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 18, 2014 · Synced Sep 28, 2026, 7:07 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 28, 2026, 7:07 PM EDT
Recruiting No phase listed Observational

Pregnancy Exposure Registry for Vumerity (Diroximel Fumarate)

NCT05658497
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Diroximel Fumarate, Avonex, Tysabri, Dimethyl Fumarate
Drug · Biological
Lead sponsor
Biogen
Industry
Eligibility
Female only
Enrollment
908 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2032
U.S. locations
2
States / cities
Aurora, Colorado • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 10, 2026 · Synced Sep 28, 2026, 7:07 PM EDT
Completed No phase listed Observational

Effect of Disease Modifying Therapy on Antibody Response to COVID19 Vaccination in Multiple Sclerosis

NCT04834401
View directory record Official record
Conditions
Multiple Sclerosis, Covid19
Interventions
Not listed
Lead sponsor
St. Barnabas Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
45 participants
Timeline
2021 – 2022
U.S. locations
1
States / cities
Livingston, New Jersey
Source: ClinicalTrials.gov public record
Updated Aug 17, 2022 · Synced Sep 28, 2026, 7:07 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 28, 2026, 7:07 PM EDT
Completed Phase 4 Interventional Results available

Natalizumab in Preventing Post-partum Relapses in Multiple Sclerosis

NCT03046251
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Natalizumab
Drug
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
18 Years and older · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2023
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jan 23, 2025 · Synced Sep 28, 2026, 7:07 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 28, 2026, 7:07 PM EDT
Terminated Phase 3 Interventional Results available

A Clinical Study of the Efficacy of Natalizumab on Reducing Disability Progression in Participants With Secondary Progressive Multiple Sclerosis

NCT01416181
View directory record Official record
Conditions
Secondary Progressive Multiple Sclerosis
Interventions
natalizumab, Placebo
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 58 Years
Enrollment
889 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
35
States / cities
Phoenix, Arizona • Tucson, Arizona • Fullerton, California + 29 more
Source: ClinicalTrials.gov public record
Updated Sep 10, 2017 · Synced Sep 28, 2026, 7:07 PM EDT
Withdrawn Not applicable Interventional

Sensation, Motion, and Quality of Life on Natalizumab and Off Natalizumab

NCT05172466
View directory record Official record
Conditions
Relapsing-remitting Multiple Sclerosis (RRMS)
Interventions
BeCare application
Device
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years to 60 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 24, 2022 · Synced Sep 28, 2026, 7:07 PM EDT
Completed Phase 4 Interventional Results available

The Effects of Tysabri Treatment on Vaccination Response and Lymphocyte Subsets in Subjects With Relapsing Forms of Multiple Sclerosis

NCT00536120
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
BG00002 (natalizumab), keyhole limpet hemocyanin (KLH), tetanus diphtheria toxoid vaccine (Td)
Biological
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 60 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
10
States / cities
Fullerton, California • Centennial, Colorado • Farmington Hills, Michigan + 7 more
Source: ClinicalTrials.gov public record
Updated Feb 14, 2017 · Synced Sep 28, 2026, 7:07 PM EDT
Not listed Phase 4 Interventional

A Pilot Study to Characterize the Biological Effect of a Pre-planned 12 Week Dose Interruption of Natalizumab

NCT04048577
View directory record Official record
Conditions
Multiple Sclerosis, Multiple Sclerosis, Relapsing-Remitting
Interventions
Dosing Interruption of Natalizumab
Drug
Lead sponsor
Berkovich, Regina MD, PhD Inc.
Other
Eligibility
21 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
West Hollywood, California
Source: ClinicalTrials.gov public record
Updated Jul 21, 2021 · Synced Sep 28, 2026, 7:07 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 28, 2026, 7:07 PM EDT
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 28, 2026, 7:07 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 28, 2026, 7:07 PM EDT
Completed Phase 4 Interventional

Natalizumab Temporary Discontinuation Study

NCT02775110
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Natalizumab discontinuation
Other
Lead sponsor
University at Buffalo
Other
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
2
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated May 16, 2016 · Synced Sep 28, 2026, 7:07 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 28, 2026, 7:07 PM EDT
Completed No phase listed Observational

Tysabri Observational Cohort Study - Multiple Sclerosis (MS) Registries

NCT03399981
View directory record Official record
Conditions
Progressive Multifocal Leukoencephalopathy
Interventions
Tysabri
Biological
Lead sponsor
Biogen
Industry
Eligibility
Not listed
Enrollment
80,327 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2023
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 18, 2024 · Synced Sep 28, 2026, 7:07 PM EDT
Terminated Phase 4 Interventional Results available

Natalizumab as an Efficacy Switch in Participants With Relapsing Multiple Sclerosis After Failure on Other Therapies

NCT02241785
View directory record Official record
Conditions
Relapsing Multiple Sclerosis
Interventions
natalizumab
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 60 Years
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
11
States / cities
Fullerton, California • Aurora, Colorado • Des Moines, Iowa + 8 more
Source: ClinicalTrials.gov public record
Updated Jun 4, 2017 · Synced Sep 28, 2026, 7:07 PM EDT