Study of Dapansutrile Tablets in Subjects With an Acute Gout Flare

This is a multi-center Phase 2/3 randomized, double-blind, placebo-controlled, parallel-group safety and efficacy study of dapansutrile (OLT1177®), a specific NLRP3 inhibitor, conducted in subjects with acute gout flare. Up to 300 eligible subjects will be randomized 2:1 to one of two treatment arms to receive either dapansutrile tablets or matching placebo twice daily for 7 days. An initial loading dose on Study Day 1 will be followed by a twice daily maintenance dosing regimen. Subjects presenting with acute gout flare that began within 96 hours prior to the Baseline/Day 1 visit will be evaluated for eligibility. Subjects who are determined to be eligible will be randomized into either an active treatment arm (2/3 of the subjects enrolled) or the placebo arm (1/3 of the subjects enrolled). Eligible subjects who are randomized into the study will also be provided with rescue medication at the Baseline/Day 1 Visit. No other pain medications, anti-inflammatory drugs (e.g., steroids or nonsteroidal anti-inflammatory drugs), or treatments for gout flare are allowed during the Treatment Period. During the Treatment Period, subjects will return to the clinic trial site on Day 4 and, following the 7-day Treatment Period, subjects will return to the clinical trial site on Day 8, and then Day 15 with safety data collected through Day 36.