Unlocking the benefits of allopurinol: the role of timely initiation and adherence in cardiovascular and renal outcomes in hyperuricemia.

Abstract

Increasing evidence links elevated serum uric acid levels to adverse cardiorenal outcomes. To date, limited data exist on whether the benefits of urate-lowering therapies (ULTs) depend on timely treatment initiation and sustained adherence in patients at high cardiovascular risk. An economic evaluation was conducted, based on a simulation model populated by Italian real-world patient-level data from the Uric Acid Right for Heart Health (URRAH) cohort to evaluate long-term cardiovascular, renal, and economic outcomes associated with timely allopurinol use. 10,000 patients with hyperuricemia (serum uric acid >5.6 mg/dL) and elevated cardiovascular risk were simulated over a 20-year time horizon. Timely initiation of allopurinol (before the first gout flare) was compared with treatment initiated only after symptomatic disease onset. Scenarios reflecting current and improved adherence to ULTs were assessed. Outcomes included major adverse cardiovascular events, end-stage renal disease onset, and economic outcomes from the payer's perspective. According to our model, timely initiation of allopurinol was associated with modest but consistent health gain (0.04 quality adjusted life years) including reductions in gout flares, cardiovascular- and renal endpoints. Timely allopurinol initiation was cost-saving and, from a health economic perspective, dominant over current practice. Improved ULT adherence amplified these benefits. Our hypothesis-generating research suggests that, in hyperuricemic patients at high cardiovascular risk, the potential benefits of allopurinol also depend on timely initiation and sustained adherence. While these findings do not constitute evidence of causal clinical benefit, they support a broader cardiorenal clinical approach to hyperuricemia management that extends beyond gout prevention.