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Myasthenia GravisFebruary 2021Summary reviewed October 2026

An Infusion That Clears Harmful Antibodies Improved Daily Function in Myasthenia Gravis — and Later Won FDA Approval

Rozanolixizumab — an infusion that reduces the harmful antibodies driving myasthenia gravis — significantly improved patients' ability to carry out daily activities like swallowing, breathing, and getting dressed compared to placebo (MG-ADL score, p=0.036). Though the primary muscle-strength endpoint narrowly missed statistical significance, the results supported a larger trial that ultimately led to FDA approval under the name Rystiggo.

What the trial was testing

The MG0002 enrolled 43 patients with myasthenia gravis. The study was sponsored by UCB Pharma and tracked outcomes across the full group of patients who matched the trial's eligibility profile.

It was a mid-stage trial — researchers are testing whether the treatment actually works for the condition. Trials at this stage are designed to produce evidence regulators and physicians can act on — not just observations to follow up later.

What the results showed

Meaningful improvement in patients' ability to carry out daily activities — a result that helped support the drug's eventual FDA approval.

Neurology · 2021 · NCT03052751

These findings — that on the daily-activities endpoint (MG-ADL), showing meaningful improvement in swallowing, breathing, and daily function — were published in the Neurology and represent the headline result of the study.

Researchers tracked outcomes across 43 patients enrolled in the trial. The result was consistent enough across the group that the team felt confident reporting it.

What this means for patients

For patients with myasthenia gravis, this result changes the calculus on what to ask their care team about. Whether it changes day-to-day care depends on factors like disease subtype, prior treatments, and where the patient is in their care journey.

What you can do now

Rozanolixizumab (Rystiggo) received FDA approval in 2023 for generalized myasthenia gravis in adults who are AChR or MuSK antibody positive. Ask your neurologist whether you qualify and whether Rystiggo or a similar FcRn inhibitor is appropriate for your situation.

Eligibility for the treatments mentioned above depends on specific test results and clinical history. Bring this summary, the trial name, and your most recent labs or pathology report to your next visit.