FDA OKs Danicopan for Extravascular Hemolysis in PNH

The US Food and Drug Administration has approved danicopan (Voydeya, AstraZeneca) as an add-on therapy to treat extravascular hemolysis in adults receiving ravulizumab or eculizumab for paroxysmal nocturnal hemoglobinuria (PNH), according to a press release form AstraZeneca.

PNH is a rare blood disorder affecting 1-10 individuals per million. The condition, which eliminates red blood cells and leads to blood clots and impaired bone marrow function, can cause life-threatening anemia, thrombosis, and bone marrow dysfunction. About half of people with the condition die from thrombotic complications.

Ravulizumab and eculizumab, also both made by AstraZeneca, inhibit the destruction of red blood cells. However, 10%-20% of patients treated with the antibody infusions experience significant extravascular hemolysis, in which these surviving red blood cells are eliminated by the spleen and liver. Extravascular hemolysis can lead to ongoing anemia, which can lead patients to require blood transfusions.

Danicopan, an investigational, first-in-class, oral complement factor D inhibitor, is designed to control intravascular hemolysis and prevent extravascular hemolysis.

Approval of the oral medication was based on the phase 3 ALPHA trial in 63 patients with PNH who received ravulizumab or eculizumab and experienced significant extravascular hemolysis. These patients were randomized 2:1 to either danicopan or placebo.

Danicopan add-on significantly improved hemoglobin concentrations at 12 weeks (least squares mean improvement from baseline: 2.94 g/dL with danicopan vs 0.50 g/dL with placebo) and made transfusions less likely.

Headache, nausea, arthralgia, and diarrhea were the most common treatment-emergent side effects. Serious adverse events in the danicopan group included cholecystitis and COVID-19 in one patient each.

Danicopan carries a black box warning of serious infections and is available only through a Risk Evaluation and Mitigation Strategy program.

M. Alexander Otto is a physician assistant with a master’s degree in medical science and a journalism degree from Newhouse. He is an award-winning medical journalist who worked for several major news outlets before joining Medscape Medical News. Alex is also an MIT Knight Science Journalism fellow. Email: aotto@mdedge.com

Source link : https://www.medscape.com/viewarticle/fda-oks-danicopan-add-extravascular-hemolysis-adults-pnh-2024a100067w?src=rss

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Publish date : 2024-04-02 13:10:42

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