Evaluating Sufenidone (SC1011) in IPF patients for efficacy and safety. Includes screening, treatment, and follow-up, with FVC decline and health checks.

Randomized, double-blind study comparing Sufenidone (SC1011) and placebo in IPF patients, with interim analysis at 26 weeks to select the optimal dose for a 52-week treatment period followed by 4-week safety monitoring

Inclusion Criteria:

• Ability to understand and sign written informed consent.
• The diagnosis time of IPF before enrollment was less than 5 years.
• Combination of High Resolution Computerized Tomography (HRCT) pattern, and if available surgical lung biopsy pattern, as assessed by central reviewers, are consistent with diagnosis of IPF.
• Dlco (corrected for Hb): 30%-90% predicted of normal.
• FVC>= 50% predicted of normal.

Exclusion Criteria:

• Forced expiratory volume in one second (FEV1)/FVC ratio <0.7 after administration of bronchodilator at Screening
• Expected to receive a lung transplant within 1 year from randomization or, for patients at sites in the United States, on a lung transplant waiting list at randomization.
• Known explanation for interstitial lung disease
• History of asthma or chronic obstructive pulmonary disease
• Active infection
• Ongoing IPF treatments including investigational therapy, immunosuppressants, and cytokine modulating agents
• History of unstable or deteriorating cardiac or pulmonary disease (other than IPF) within the previous 6 months