Oral steroid tapering for adults with generalized myasthenia gravis on ravulizumab.
Official title: OCTAGON: A Phase 4, Single Arm Study to Investigate Oral Corticosteroid Tapering in Adult Patients With Generalized Myasthenia Gravis Treated With Ravulizumab
Run by Alexion Pharmaceuticals, Inc. · NCT07221838 · Data updated 2026-11-12
This study will try a predefined prednisone taper to see if adults with generalized myasthenia gravis on ravulizumab can safely reduce their daily steroid dose.
Quick facts
| Phase | Phase 4 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 75 (estimated) |
| Sponsor | Alexion Pharmaceuticals, Inc. Industry-sponsored |
| Drugs / interventions | ravulizumab, rozanolixizumab, inebilizumab, rituximab, prednisone |
| Locations | 12 sites (Chicago, Illinois and 11 other locations) |
| Status | Recruiting |
| Started | March 4, 2026 |
| Main results expected | August 27, 2027 |
| Study ends | August 27, 2027 |
| Registry record updated | April 9, 2026 |
| Trial ID | NCT07221838 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults (≥18 years) with AChR-positive generalized myasthenia gravis who are already receiving ravulizumab and have been on at least 7.5 mg/day prednisone (or equivalent) for four continuous weeks are the intended participants.
✕Probably not a fit
Patients using oral steroids for other medical conditions, those with chronic hypoadrenalism, pregnant or breastfeeding individuals, or those who recently received other biologic gMG therapies are unlikely to benefit or may be ineligible.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This is a prospective, multicenter, single-arm Phase 4 study of adults with acetylcholine receptor–positive generalized myasthenia gravis who are already receiving ravulizumab. Eligible participants must have been taking at least 7.5 mg/day prednisone (or equivalent) for at least four continuous weeks prior to enrollment and will follow a predefined oral corticosteroid taper while continuing ravulizumab. The study will track steroid dose reduction, disease control, and adverse events during and after the taper. Data collected at U.S. research sites will inform whether this tapering approach can be implemented safely in routine care.
Why it matters
Potential benefit: If successful, the taper could let patients lower their steroid doses and reduce long-term steroid-related side effects while maintaining disease control.
How similar studies have gone: Complement C5 inhibitors like eculizumab and ravulizumab have improved gMG symptoms and have been associated with steroid-sparing in some reports, but a prospective predefined OCS taper specifically with ravulizumab is relatively novel.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Aged greater than 18 years and male or female * Clinical diagnosis of gMG * Receiving ravulizumab treatment prior to enrollment * Receipt of OCS therapy equivalent to a daily dose ≥ 7.5 mg of prednisone/prednisolone for ≥ 4 continuous weeks directly preceding enrollment * A participant of childbearing potential must have a negative highly sensitive pregnancy test (serum or urine, as required by local regulations) taken at Screening before OCS tapering begins. * Willing to sign informed consent Exclusion Criteria: * Concurrent participation in an interventional clinical trial. * History of chronic hypoadrenalism (ie, Addison's disease). * Use of concomitant OCS for comorbid conditions other than gMG * Receipt of a biologic for gMG (e.g., efgartigimod, rozanolixizumab, inebilizumab, rituximab, intravenous immunoglobulin) within 5 half-lives of enrollment * Pregnant, breastfeeding, or intending to conceive during the course of the study
Where it's running
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Research Site
Raleigh, North Carolina, United States Recruiting -
Research Site
Chicago, Illinois, United States Not yet recruiting -
Research Site
Schaumburg, Illinois, United States Not yet recruiting -
Research Site
Neptune City, New Jersey, United States Not yet recruiting -
Research Site
Knoxville, Tennessee, United States Not yet recruiting -
Research Site
Bochum, Germany Not yet recruiting
Show 6 more locations
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Research Site
Milan, Italy Not yet recruiting -
Research Site
Naples, Italy Not yet recruiting -
Research Site
Rome, Italy Not yet recruiting -
Research Site
Ibaraki, Japan Not yet recruiting -
Research Site
Kitakyushu-shi, Japan Not yet recruiting -
Research Site
Kumamoto, Japan Not yet recruiting
Study contacts
- Study coordinator: Alexion Pharmaceuticals, Inc. (Sponsor)
- Email: clinicaltrials@alexion.com
- Phone: 1-855-752-2356
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.