Novartis Fabhalta wins FDA approval to slow kidney decline in IgAN
Novartis received FDA traditional approval for Fabhalta (iptacopan) to slow kidney function decline in adults with primary IgAN. Phase III data showed a 48% reduction in eGFR decline versus placebo over two years. The drug targets the alternative complement pathway and is available via a REMS program.

*this image is generated using AI for illustrative purposes only.
Novartis today announced that the US Food and Drug Administration (FDA) has granted traditional approval for Fabhalta (iptacopan) to slow kidney function decline in adults with primary immunoglobulin A nephropathy (IgAN) at risk of disease progression. Fabhalta, a first-in-class complement inhibitor, slows estimated glomerular filtration rate (eGFR) decline by 48% versus placebo over two years. This approval converts an initial accelerated approval granted in August 2024 for the reduction of proteinuria in primary IgAN.
The approval was based on data from the Phase III APPLAUSE-IgAN study. Results demonstrated a statistically significant and clinically meaningful improvement in eGFR over two years. Fabhalta showed an annualized mean change from baseline in eGFR of -3.0 mL/min/1.73 m²/yr compared with -5.7 mL/min/1.73 m²/yr for placebo. Clinically meaningful improvements in protein in urine were observed as early as two weeks, with sustained reduction over the treatment period.
Safety profile and access
The APPLAUSE-IgAN study indicated that Fabhalta has a favorable safety profile, consistent with previously reported data. The most common adverse events in patients with IgAN were abdominal pain, dizziness, and nausea. Fabhalta may increase the risk of serious infections caused by encapsulated bacteria and is available only through a Risk Evaluation and Mitigation Strategy (REMS) program requiring appropriate vaccinations prior to treatment.
Novartis is committed to helping IgAN patients access Fabhalta through support programs, with nearly 100% of US patients paying $10 or less per month. The company’s growing IgAN portfolio includes Vanrafia (atrasentan) and the investigational compound zigakibart.
Mechanism of action
Fabhalta is an oral Factor B inhibitor designed to selectively target the alternative complement pathway. This pathway is a key driver of inflammation associated with IgAN. By inhibiting Factor B, the drug aims to reduce ongoing complement-mediated injury and slow disease progression. Fabhalta has received regulatory approvals in multiple complement-mediated diseases and is being evaluated across a range of rare kidney conditions.
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How will the traditional approval of Fabhalta impact Novartis's competitive position against other complement inhibitors in the rare kidney disease market?
What are the potential challenges and timelines for expanding Fabhalta's indications to other complement-mediated rare kidney conditions?
How might the REMS program and vaccination requirements affect patient adherence and prescribing rates for Fabhalta?


































