A Multicenter Trial to Evaluate the Efficacy, Safety and Tolerability of HZN-825 in Subjects With Idiopathic Pulmonary Fibrosis

Part 1 (Core Phase) The overall objective of the Core Phase is to investigate the efficacy, safety and tolerability of 2 dose regimens of HZN-825, a selective antagonist of lysophosphatidic acid receptor-1 (LPAR1), administered orally once daily (QD) or twice daily (BID) for 52 weeks in the treatment of participants with IPF. Part 2 (Extension Phase) The overall objective of the Extension Phase is to investigate the long-term efficacy, safety and tolerability of HZN-825, a selective antagonist of LPAR1, administered at a dose of 300 mg BID orally to participants with IPF in a 52-week open-label extension (OLE) following completion of the Core Phase of the trial. The dose for the Extension Phase may be modified based on the results of the Core Phase. Two types of Baseline are defined for the Extension Phase: * OLE Baseline, defined as the latest measurement prior to the first dose of HZN-825 in the Extension Phase * HZN-825 Baseline, defined as the latest measurement prior to the first dose of HZN-825 in either the Core Phase or the Extension Phase. For subjects who received placebo in the Core Phase, OLE Baseline will be the same as HZN-825 Baseline. Acquired from Horizon in 2024