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Vanrafia / atrasentan for reducing proteinuria in primary IgA nephropathy

As of February 2026, MARA’s assessment finds VANRAFIA / atrasentan’s reimbursement risk concentrated in cost effectiveness, with patient population and subgroups a strength; the current MARA Rating and full rationale are available in the report.

The assessment also weighs quality of life: whether the trial benefit shows up in patients’ daily lives, not only in the clinical endpoints. The strength recorded in patient population and subgroups carries weight because that domain asks how closely the trial population matches the patients who would receive the drug in practice; payers often restrict funding to the groups where the evidence is strongest.

Nephrology

This rating sits within MARA’s Nephrology coverage, alongside 16 other independently assessed treatments in the same area.

What payers will ask

Is the clinical benefit the kind payers reward? — Clinical effectiveness

The evidence from the phase 3 ALIGN trial shows a significant reduction in proteinuria with atrasentan compared to placebo, with a between-group difference of -36.1 percentage points (P<0.001). This indicates a clear clinical advantage over standard care, although long-term efficacy remains uncertain.

Does the economic case hold at the expected price? — Cost effectiveness

No cost-effectiveness analysis or ICER data is available for atrasentan. The lack of economic modeling and transparency regarding costs raises significant concerns about its economic viability.

Is there quality-of-life evidence payers weigh? — Quality of life

There is no evidence of HRQoL data or validated instruments reported in the available sources. The absence of such data limits the assessment of the treatment’s impact on patients’ overall well-being.

Does the safety profile hold up for payers? — Safety and Adverse Effects

The short-term safety profile shows that adverse events were comparable between the atrasentan and placebo groups, with no severe complications reported. However, long-term safety data is limited, which introduces some uncertainty.

Was the drug compared against what payers expect? — Comparator Selection

The comparator used in the ALIGN trial is placebo, which is appropriate for an add-on therapy evaluation. However, the absence of active comparator data limits the ability to assess comparative efficacy against other treatments.

Is the population defined the way payers need it? — Patient Population and Subgroups

The trial population is broadly representative, with diverse demographics reported. Subgroup analyses indicate consistent efficacy across various patient characteristics, enhancing generalizability.

Does the drug fit how care is delivered and paid for? — Care Pathway Integration

Atrasentan can be integrated into existing care pathways with minimal disruption, as it is administered orally and does not require significant changes to current treatment protocols.

Are the wider system costs understood? — Resource Use and Cost Implications

While the annual wholesale acquisition cost is reported, there is a lack of comprehensive data on the broader resource implications and potential cost offsets from avoided events.

Would the evidence survive payer scrutiny? — Evidence Quality and Robustness

The evidence is derived from a phase 3 RCT with a robust design, although it is primarily based on interim analysis and lacks long-term follow-up data. The consistency of results across sources supports its credibility.

How exposed is the case to uncertainty? — Uncertainty, Sensitivity, and Broader Impacts

There is significant uncertainty regarding the long-term benefits of atrasentan, as the FDA has indicated that continued approval may depend on confirmatory evidence. This uncertainty could impact its broader acceptance.

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