Lesinurad, a Selective URAT-1 Inhibitor With a Novel Mechanism in Combination With a Xanthine Oxidase Inhibitor, for Hyperuricemia Associated With Gout

Objective: To review the pharmacokinetics, clinical efficacy, safety, and role of lesinurad for the management of hyperuricemia associated with gout. Data Selection: A MEDLINE search (2000 to April 2017) was conducted using the terms hyperuricemia, gout, URAT-1, URAT-1 transporter, and lesinurad. Published articles and scientific posters relevant to the efficacy and safety of lesinurad were reviewed and summarized. Data Synthesis: Lesinurad was evaluated in 3 randomized, phase 3 clinical trials (CRYSTAL, CLEAR 1 and 2). The primary endpoint for CRYSTAL trial was the percentage of patients achieving serum uric acid (SUA) concentration <= 5 mg/dL. The CLEAR 1 and 2 trials had a primary endpoint of percentage of patients achieving SUA concentration <= 6 mg/dL. Lesinurad at either 200 or 400 mg/d was superior to xanthine oxidase inhibitor (XOI) monotherapy in reducing the SUA concentration to 5 or 6 mg/dL, when added to either allopurinol or febuxostat. Conclusion: Data from phase 3 clinical studies suggest the addition of lesinurad to allopurinol or febuxostat is superior to XOI monotherapy alone in reducing SUA concentrations while increasing the risk of renal-related adverse events. Lesinurad, 200 mg orally per day, would be a safe recommendation, in combination with an XOI, among patients with adequate renal function (i.e., above 45 mL/min) who need additional therapy for inadequately controlled hyperuricemia associated with gout.