A Study to Assess the Long-term Safety and Efficacy of a Subcutaneous Formulation of Efgartigimod in Adults With Chronic Inflammatory Demyelinating Polyneuropathy (CIDP, an Autoimmune Disorder That Affects the Peripheral Nerves)
Public ClinicalTrials.gov record NCT04280718. 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
Open-label Extension of the ARGX-113-1802 Trial to Investigate the Long-term Safety, Tolerability, and Efficacy of Efgartigimod PH20 SC in Patients With Chronic Inflammatory Demyelinating Polyneuropathy (CIDP)
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This is the open-label extension study of phase II ARGX-113-1802 to evaluate the long-term safety and efficacy of the subcutaneous formulation of efgartigimod in adults with CIDP. Patients already stabilized on efgartigimod PH20 SC will also have the opportunity to participate in a sub study to explore less frequent dosing of efgartigimod PH20 SC.
Study identification
- NCT ID
- NCT04280718
- Recruitment status
- Active, not recruiting
- Study type
- Interventional
- Phase
- Phase 2
- Enrollment
- 229 participants
Conditions and interventions
Eligibility (public fields only)
- Age range
- 18 Years and older
- 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 18, 2020 (Actual)
- Primary completion
- Apr 30, 2027 (Estimated)
- Completion
- Apr 30, 2027 (Estimated)
- Last update posted
- Jun 29, 2025
2020 – 2027
United States locations
- U.S. sites
- 25
- U.S. states
- 14
- U.S. cities
- 24
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Investigator site 0010065 | Birmingham | Alabama | 35233-2110 | — |
| Investigator site 0010013 | Phoenix | Arizona | 85018 | — |
| Investigator site 0010055 | Scottsdale | Arizona | 85028 | — |
| Investigator site 0010032 | Carlsbad | California | 92011 | — |
| Investigator site 10190 | Pomona | California | 91767-2009 | — |
| Investigator site 0010160 | Rancho Mirage | California | 92270-4150 | — |
| Investigator site 0010071 | San Francisco | California | 94109 | — |
| Investigator site 0010057 | Centennial | Colorado | 80112 | — |
| Investigator site 0010072 | Boca Raton | Florida | 33487 | — |
| Investigator site 0010144 | Coral Springs | Florida | 33067-4640 | — |
| Investigator site 0010023 | Jacksonville | Florida | 32209 | — |
| Investigator site 0010068 | Maitland | Florida | 32751 | — |
| Investigator site 0010059 | Miami | Florida | 33136 | — |
| Investigator site 0010006 | Tampa | Florida | 33612 | — |
| Investigator site 0010011 | Iowa City | Iowa | 52242 | — |
| Investigator site 0010015 | Fairway | Kansas | 66205 | — |
| Investigator site 10147 | Lexington | Kentucky | 40536 | — |
| Investigator site 10168 | New York | New York | 10016 | — |
| Investigator site 0010003 | Chapel Hill | North Carolina | 27517 | — |
| Investigator site 0010064 | Columbus | Ohio | 43210 | — |
| Investigator site 0010007 | Philadelphia | Pennsylvania | 19107 | — |
| Investigator site 0010047 | Philadelphia | Pennsylvania | 19126 | — |
| Investigator Site 0010066 | Austin | Texas | 78756 | — |
| Investigator site 0010009 | San Antonio | Texas | 78229 | — |
| Investigator site 0010061 | Richmond | Virginia | 23298 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 122 non-U.S. sites.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04280718, 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 Jun 29, 2025 · Synced Oct 31, 2026
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Open the official record
The complete public registry record, listed eligibility criteria, and available contact information for NCT04280718 live on ClinicalTrials.gov.