The main purpose of this study is to evaluate the efficacy of MY008211A in adult patients with PNH, showing signs of active hemolysis.
Male and female participants ≥ 18 years of age and BMI ≥ 18.0 kg/m2 with a diagnosis of PNH confirmed by high-sensitivity flow cytometry with clone size ≥ 10%.
Mean hemoglobin level <100 g/L.
LDH > 1.5 x Upper Limit of Normal (ULN).
Vaccination against Neisseria meningitidis infection is required prior to the start of study treatment. If not received previously, vaccination against Streptococcus pneumoniae and Haemophilus influenzae infections should be given.
Patients with reticulocytes <100x10^9/L; platelets <30x10^9/L; neutrophils <0.5x10^9/L.
Were using a complement inhibitor before the first administration of MY008211A tablets or had discontinued a previous complement inhibitor for less than five half-lives or 120 days, whichever was the longest.
History of recurrent invasive infections caused by encapsulated organisms, e.g. meningococcus or pneumococcus.
Known or suspected hereditary complement deficiency.