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ClinicalTrials.gov public records Last synced Oct 2, 2026, 3:20 PM EDT

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Showing 1–16 of 16 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Tysabri® (natalizumab) Clear all
Completed No phase listed Observational

JC-Virus (JCV) Antibody Program

NCT01070823
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Tysabri® (natalizumab)
Drug
Lead sponsor
Biogen
Industry
Eligibility
Not listed
Enrollment
1,096 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
11
States / cities
Aurora, Colorado • Atlanta, Georgia • Cullman, Georgia + 8 more
Source: ClinicalTrials.gov public record
Updated Oct 5, 2016 · Synced Oct 2, 2026, 3:20 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 22, 2015 · Synced Oct 2, 2026, 3:20 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 31, 2017 · Synced Oct 2, 2026, 3:20 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 11, 2014 · Synced Oct 2, 2026, 3:20 PM EDT
Completed Phase 2 Interventional Results available

Phase II Trial of Natalizumab + Prednisone for Initial Therapy of Acute GI GVHD

NCT02176031
View directory record Official record
Conditions
Graft Versus Host Disease
Interventions
Natalizumab, Methylprednisolone
Drug
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 17, 2020 · Synced Oct 2, 2026, 3:20 PM EDT
Completed No phase listed Observational

Real-world Outcomes on Tecfidera (BG00012, Dimethyl Fumarate) Post-Tysabri (BG00002, Natalizumab)

NCT02159573
View directory record Official record
Conditions
Relapsing-Remitting Multiple Sclerosis
Interventions
natalizumab, dimethyl fumarate
Biological · Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years and older
Enrollment
530 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
43
States / cities
Birmingham, Alabama • Cullman, Alabama • Gilbert, Arizona + 40 more
Source: ClinicalTrials.gov public record
Updated Jun 7, 2016 · Synced Oct 2, 2026, 3:20 PM EDT
Completed No phase listed Observational

Validation of a Laboratory Test Measuring Natalizumab (Tysabri®) Serum Levels in MS

NCT02965170
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Not listed
Lead sponsor
Rocky Mountain MS Research Group, LLC
Other
Eligibility
18 Years to 80 Years
Enrollment
109 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 24, 2019 · Synced Oct 2, 2026, 3:20 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 9, 2014 · Synced Oct 2, 2026, 3:20 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 16, 2026 · Synced Oct 2, 2026, 3:20 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 5, 2017 · Synced Oct 2, 2026, 3:20 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 18, 2009 · Synced Oct 2, 2026, 3:20 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Effect of Tysabri in Patients With Relapsing-Remitting Multiple Sclerosis: A Follow-up Magnetization Transfer Imaging (MTI) Study

NCT00937677
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Tysabri
Drug
Lead sponsor
University at Buffalo
Other
Eligibility
18 Years to 65 Years
Enrollment
85 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Sep 7, 2011 · Synced Oct 2, 2026, 3:20 PM EDT
Active, not recruiting No phase listed Observational

A Study to Learn More About The Safety of Diroximel Fumarate (VUMERITY®) in Participants Who Took it During Pregnancy And About the Health of Their Babies

NCT05688436
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Diroximel Fumarate, Alemtuzumab, Fingolimod, Glatiramer acetate, Interferon beta, Natalizumab, Ocrelizumab, Ofatumumab, Ozanimod, Peginterferon beta-1a, Ponesimod, Siponimod
Drug · Biological
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 49 Years · Female only
Enrollment
1,178 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2031
U.S. locations
1
States / cities
Eden Prairie, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Oct 2, 2026, 3:20 PM EDT
Completed Phase 4 Interventional

NAPS-MS: NAtalizumab Effects on Parameters of Sleep in Patients With Multiple Sclerosis Experiencing Fatigue or Sleepiness

NCT01591551
View directory record Official record
Conditions
Multiple Sclerosis, Relapsing-Remitting
Interventions
Natalizumab (Tysabri)
Drug
Lead sponsor
Cornerstone Health Care, PA
Other
Eligibility
18 Years to 65 Years
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
3
States / cities
Patchogue, New York • High Point, North Carolina • Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jan 29, 2014 · Synced Oct 2, 2026, 3:20 PM EDT
Completed Not applicable Interventional Results available

Tysabri Effects on Cognition and Neurodegeneration in Multiple Sclerosis

NCT01071512
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Tysabri
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 60 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 25, 2017 · Synced Oct 2, 2026, 3:20 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 22, 2021 · Synced Oct 2, 2026, 3:20 PM EDT