for people ages 12 years and up (full criteria)
at Irvine, California and other locations
study started
estimated completion



A study designed to evaluate the non-inferiority of crovalimab compared with eculizumab in participants with PNH switching from eculizumab. This study will enroll approximately 250 participants randomized in a 1:1 ratio to the two arms.

Official Title

A Phase III, Randomized, Open-Label, Active-Controlled, Multicenter Study Evaluating The Efficacy And Safety Of Crovalimab Versus Eculizumab In Adult And Adolescent Patients With Paroxysmal Nocturnal Hemoglobinuria (PNH) Currently Treated With Complement Inhibitors.


Paroxysmal Nocturnal Hemoglobinuria Hemoglobinuria Hemoglobinuria, Paroxysmal Crovalimab Eculizumab


You can join if…

Open to people ages 12 years and up

  • Body weight >= 40 kg at screening.
  • Treated with eculizumab or ravulizumab for PNH for at least 3 months prior to Day 1.
  • Lactate Dehydrogenase Levels =< 2x the upper limit of normal (ULN) at screening.
  • Willingness and ability to comply with all study visits and procedures.
  • Documented diagnosis of PNH, confirmed by high sensitivity flow cytometry.
  • Vaccination against Neisseria meningitidis < 3 years prior to initiation of study treatment.
  • Women of childbearing potential: agreement to remain abstinent (refrain from heterosexual intercourse) or use contraception during the treatment period and for 6 months after the final dose of crovalimab or for 3 months after the final dose of eculizumab.

You CAN'T join if...

  • History of allogeneic bone marrow transplantation.
  • Pregnant or breastfeeding, or intending to become pregnant during the study or within 6 months after the final dose of study treatment.
  • Participation in another interventional treatment study with an investigational agent or use of any experimental therapy within 28 days of screening or within 5 half-lives of that investigational product, whichever was greater: participants enrolled in an eculizumab or ravulizumab interventional study are eligible provided they fulfill eligibility (e.g., are willing and able to comply with the study assessments) and stop their current trial.
  • Positive for Active Hepatitis B and C infection (HBV/HCV).
  • Concurrent disease, treatment, procedure, or surgery or abnormality in clinical laboratory tests that could interfere with the conduct of the study, may pose any additional risk for the participant, or would, in the opinion of the investigator, preclude the participant's safe participation in and completion of the study.
  • History of or ongoing cryoglobulinemia at screening.


  • University of California Irvine not yet accepting patients
    Irvine California 92697 United States
  • The Oncology Institute of Hope and Innovation accepting new patients
    Anaheim California 92801 United States


accepting new patients
Start Date
Completion Date
Hoffmann-La Roche
Phase 3
Study Type
Last Updated