Effect of bempedoic acid on uric acid and gout in 3621 patients with hypercholesterolemia: pooled analyses from phase 3 trials

Abstract Background Bempedoic acid (BA), an oral ATP-citrate lyase inhibitor, significantly lowers low-density lipoprotein cholesterol levels in patients with hypercholesterolemia. In clinical trials of BA, small mean increases in uric acid have been reported. BA weakly inhibits organic anion transporter 2 (OAT2) in vitro, which may account for small elevations in serum uric acid. Purpose To assess uric acid levels and incidence of gout with BA treatment. Methods Data were pooled from 4 randomized (2:1), double-blind studies of BA (180 mg daily) vs placebo for 12 weeks to 52 weeks in patients with hypercholesterolemia on stable background lipid-lowering therapy. Safety assessments included adverse events of special interest (elevation in uric acid levels, gout) and laboratory assessments. Results A total of 2424 patients treated with BA and 1197 patients on placebo were included in this analysis. Mean (SD) baseline uric acid levels were 6.0 (1.4) mg/dL for both groups. History of gout was reported by 5.2% (127/2424) and 5.8% (69/1197) in the BA and placebo groups, respectively. At week 12, mean (SD) serum uric acid levels (% change from baseline) increased from baseline with BA treatment by 0.82 (0.97) mg/dL (14.8%) vs –0.02 (0.82) mg/dL (0.67%) for placebo. Elevations in serum uric acid levels typically occurred within the first 4 weeks of treatment, remained stable during treatment, and returned to baseline after treatment discontinuation. Gout was reported in 1.4% (BA) and 0.4% (placebo) of patients, and hyperuricemia was reported in 1.7% (BA) and 0.6% (placebo) of patients. Other potential clinical consequences of elevated uric acid levels (eg, events associated with nephrolithiasis), were similar between groups (0.7% vs 0.8%). In both groups, patients who reported gout during the studies were more likely to have a medical history of gout or elevated baseline uric acid levels (Table). Few patients discontinued treatment due to gout (n=1, <0.1% [BA]) or uric acid increases (n=2, <0.1% [BA]). Conclusion Mean increases in uric acid levels were small, remained stable while patients continued to receive treatment, were infrequently associated with AEs, and were reversible on discontinuation of BA Funding Acknowledgement Type of funding source: Private company. Main funding source(s): Esperion Therapeutics funded the research for this study and provided writing support for this abstract. Medical writing assistance was provided by Agnella Izzo Matic, PhD, CMPP, and Kelly M Cameron, PhD, CMPP, of JB Ashtin.

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