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ClinicalTrials.gov public records Last synced Sep 29, 2026, 12:55 AM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
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
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
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
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
Completed Phase 2 Interventional Results available

Natalizumab High Titer Immunogenicity and Safety

NCT00516893
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
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
Conditions
Crohn's Disease
Interventions
natalizumab
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years and older
Enrollment
2,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2004
U.S. locations
1
States / cities
San Diego, California
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
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
Completed No phase listed Observational

JC-Virus (JCV) Antibody Program

NCT01070823
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
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
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
Conditions
Multiple Sclerosis
Interventions
Natalizumab
Drug
Lead sponsor
Multiple Sclerosis Center of Northeastern New York
Other
Eligibility
18 Years and older
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Latham, New York
Completed Phase 2 Interventional Results available

Treatment Interruption of Natalizumab

NCT01071083
Conditions
Relapsing Remitting Multiple Sclerosis
Interventions
natalizumab, interferon beta 1-a, methylprednisolone, IV placebo, glatiramer acetate
Drug · Other
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 60 Years
Enrollment
175 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
20
States / cities
Cullman, Alabama • San Francisco, California • Fort Collins, Colorado + 15 more
Completed Phase 4 Interventional Results available

MAIN STUDY: SWITCH SUB-STUDY: SWITCH-JCV

NCT01970410
Conditions
Multiple Sclerosis
Interventions
teriflunomide
Drug
Lead sponsor
Providence Health & Services
Other
Eligibility
21 Years to 60 Years
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2022
U.S. locations
3
States / cities
Phoenix, Arizona • Latham, New York • Portland, Oregon
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
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
Conditions
Relapsing Multiple Sclerosis
Interventions
natalizumab
Drug
Lead sponsor
Biogen
Industry
Eligibility
Not listed
Enrollment
35,895 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
473
States / cities
Birmingham, Alabama • Cullman, Alabama • Tucaloosa, Alabama + 386 more
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
Conditions
Relapsing Remitting Multiple Sclerosis
Interventions
BG00002 (natalizumab), interferon beta-1a, glatiramer acetate
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 60 Years
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
19
States / cities
Cullman, Alabama • Phoenix, Arizona • Fort Collins, Colorado + 16 more
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
Conditions
Inclusion Body Myositis (IBM)
Interventions
Natalizumab
Drug
Lead sponsor
Phoenix Neurological Associates, LTD
Other
Eligibility
21 Years to 85 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
Phoenix, Arizona
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
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