Ravulizumab, a new long-acting C5 inhibitor, recently received FDA approval for the treatment of aHUS. Rates of complete thrombotic microangiopathy response were similar to those observed in major eculizumab trials; however, fewer patients in the ravulizumab study were able to stop dialysis, probably due to differences in the study populations. Until additional data/analyses are available, eculizumab remains the drug of choice for an acute aHUS episode, whereas ravulizumab has several advantages in maintenance treatment.
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