MAIN STUDY: SWITCH SUB-STUDY: SWITCH-JCV
Public ClinicalTrials.gov record NCT01970410. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
MAIN STUDY: Switching Relapsing Multiple Sclerosis Patients Treated With Natalizumab at Risk for Progressive Multifocal Leukoencephalopathy to Teriflunomide: Is This Safe and Effective? SUB-STUDY: Analysis of JCV Antibody Index in MS Patients Treated With Teriflunomide
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
MAIN STUDY: The purpose of this study is to determine if teriflunomide will be safe and effective to prevent relapses in patients with relapsing types of MS when switching from natalizumab to teriflunomide in patients at risk for PML. This is a two center interventional study of patients who have had 12 or more continuous infusions of natalizumab , who are anti-JCV-ab positive, and who had been free of clinical relapses during prior 12 months of natalizumab therapy who will be switching to teriflunomide. SUB-STUDY: To study the number of patients experiencing a reduction in the anti-JCV antibody Index value in patients who had received at least one dose of teriflunomide during participation in the SWITCH protocol (main study).
Study identification
- NCT ID
- NCT01970410
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 4
- Enrollment
- 55 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 21 Years to 60 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Sep 30, 2013
- Primary completion
- Apr 29, 2021
- Completion
- Feb 13, 2022
- Last update posted
- Jan 29, 2023
2013 – 2022
United States locations
- U.S. sites
- 3
- U.S. states
- 3
- U.S. cities
- 3
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Phoenix Neurological Associates, Ltd | Phoenix | Arizona | 85018 | — |
| Multiple Sclerosis Center of Northeastern New York | Latham | New York | 12110 | — |
| Providence Multiple Sclerosis Center | Portland | Oregon | 97225 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT01970410, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jan 29, 2023 · Synced Sep 6, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT01970410 live on ClinicalTrials.gov.