Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
Search Results

Search by objective public record fields.

Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results come from ClinicalTrials.gov. When the live registry is unavailable, a clearly labeled stored copy may be shown.

Clear filters

These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.

ClinicalTrials.gov public records Last synced Oct 22, 2026, 7:23 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 82 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Natalizumab Clear all
Completed No phase listed Observational

A Study to Assess New Participant's Perspectives Beyond Clinical Efficacy of Monoclonal Antibody-Based Relapsing Remitting Multiple Sclerosis (RRMS) Treatments

NCT06127095
View directory record Official record
Conditions
Multiple Sclerosis, Relapsing-Remitting
Interventions
Not listed
Lead sponsor
Biogen
Industry
Eligibility
18 Years and older
Enrollment
474 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 18, 2024 · Synced Oct 22, 2026, 7:23 PM EDT
Withdrawn No phase listed Observational

A Cross-Sectional Study of MSDx Complex 1 as a Marker for Active Disease in Multiple Sclerosis

NCT01539395
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
MSDx Complex-1 Biomarker Test
Other
Lead sponsor
MSDx, Inc.
Industry
Eligibility
45 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Sep 2, 2020 · Synced Oct 22, 2026, 7:23 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 22, 2026, 7:23 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 24, 2025 · Synced Oct 22, 2026, 7:23 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 16, 2016 · Synced Oct 22, 2026, 7:23 PM EDT
Terminated Phase 4 Interventional Results available

Natalizumab and Chronic Inflammation

NCT05177718
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Natalizumab 300 MG in 15 ML Injection
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 18, 2024 · Synced Oct 22, 2026, 7:23 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 18, 2022 · Synced Oct 22, 2026, 7:23 PM EDT
Completed No phase listed Observational

Longitudinal Analysis And Sample Collection To Evaluate PML Risk Host Markers for PML Risk Host Markers for PML Risk

NCT02440126
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Not listed
Lead sponsor
Rocky Mountain MS Research Group, LLC
Other
Eligibility
18 Years and older
Enrollment
196 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Feb 21, 2021 · Synced Oct 22, 2026, 7:23 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 22, 2026, 7:23 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 9, 2017 · Synced Oct 22, 2026, 7:23 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 21, 2017 · Synced Oct 22, 2026, 7:23 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 27, 2019 · Synced Oct 22, 2026, 7:23 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 – 2033
U.S. locations
23
States / cities
Palo Alto, California • Aurora, Colorado • Evanston, Illinois + 18 more
Source: ClinicalTrials.gov public record
Updated Oct 20, 2026 · Synced Oct 22, 2026, 7:23 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 8, 2025 · Synced Oct 22, 2026, 7:23 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 22, 2026, 7:23 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 15, 2017 · Synced Oct 22, 2026, 7:23 PM EDT
Terminated No phase listed Observational

Efficacy of COVID-19 Vaccination in Patients With Multiple Sclerosis Treated With Immune Modulating Medication

NCT04796584
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Analysis of cell-mediated and antibody-mediated immunity to SARS-CoV-2 virus
Other
Lead sponsor
Providence Health & Services
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 3, 2023 · Synced Oct 22, 2026, 7:23 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 25, 2022 · Synced Oct 22, 2026, 7:23 PM EDT
Completed No phase listed Observational Results available

Evaluating the Efficacy and Safety of Transitioning Patients From Natalizumab to Ocrelizumab

NCT03157830
View directory record Official record
Conditions
Relapsing Remitting Multiple Sclerosis
Interventions
Not listed
Lead sponsor
Providence Health & Services
Other
Eligibility
18 Years to 65 Years
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
5
States / cities
Livingston, New Jersey • Portland, Oregon • Richland, Washington + 2 more
Source: ClinicalTrials.gov public record
Updated Sep 19, 2024 · Synced Oct 22, 2026, 7:23 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 22, 2026, 7:23 PM EDT
Completed No phase listed Observational

Pilot Study to Assess Disease Stability in a Natalizumab to Dimethyl Fumarate Crossover Design

NCT01945359
View directory record Official record
Conditions
Relapsing Remitting Multiple Sclerosis
Interventions
Not listed
Lead sponsor
Rocky Mountain MS Research Group, LLC
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Oct 16, 2015 · Synced Oct 22, 2026, 7:23 PM EDT
Completed Phase 3 Interventional

Open-Label Natalizumab Safety Extension Study

NCT00276172
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Natalizumab
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years and older
Enrollment
1,615 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 22, 2009 · Synced Oct 22, 2026, 7:23 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 16, 2016 · Synced Oct 22, 2026, 7:23 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Humoral and T-Cell Responses to COVID-19 Vaccination in Multiple Sclerosis Patients Treated With Ocrelizumab Treated With Ocrelizumab or Natalizumab

NCT04837651
View directory record Official record
Conditions
Multiple Sclerosis, Demyelinating Autoimmune Diseases, CNS, Autoimmune Diseases of the Nervous System, Nervous System Diseases, Demyelinating Diseases, Autoimmune Diseases, Immune System Diseases, Pathologic Processes
Interventions
Elecsys semi-quantitative Anti-SARS-CoV-2 antibody test, T-Detect COVID T-cell blood test
Device
Lead sponsor
Dragonfly Research, LLC
Other
Eligibility
18 Years to 55 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Wellesley, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 2, 2021 · Synced Oct 22, 2026, 7:23 PM EDT