Clinical trial Recruiting at 1 site Phase 4 Interventional Ages 18 and up

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.

More Generalized Myasthenia Gravis trials

Quick facts

PhasePhase 4
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment75 (estimated)
SponsorAlexion Pharmaceuticals, Inc.
Industry-sponsored
Drugs / interventionsravulizumab, rozanolixizumab, inebilizumab, rituximab, prednisone
Locations12 sites (Chicago, Illinois and 11 other locations)
StatusRecruiting
StartedMarch 4, 2026
Main results expectedAugust 27, 2027
Study endsAugust 27, 2027
Registry record updatedApril 9, 2026
Trial IDNCT07221838 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

  • 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
  • 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

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.