The study consists of 3 phases in which you will undergo several tests and in which the investigational study drug will be administered.
Screening phase (up to 5 weeks): to perform tests to check eligibility to join this study.
Treatment phase: up to 12 weeks participation in the Double-blinded treatment phase. Participants are randomly assigned to a treatment group and will receive 4 doses of either empasiprubart (group 1) or placebo (group 2). There is 75% chance that you will be in group 1.
Follow up phase (up to 28 weeks): participants will receive 4 cycles of efgartigimod PH20 SC PFS**. The study team will continue to monitor you for safety. This will include physical check-ups, blood work and urine tests, and answering health-related questions.
**efgartigimod PH20 SC PFS is approved for use in generalized Myasthenia Gravis in adult patients who are acetylcholine receptor antibody (AChR-Ab) positive.