PIPF-016 (ASCEND) is a Randomized, Double-Blind, Placebo Controlled, Phase 3 Study of the Efficacy and Safety of Pirfenidone in Patients with Idiopathic Pulmonary Fibrosis. The study objectives are to confirm the treatment effect of pirfenidone compared with placebo on change in percent predicted forced vital capacity (%FVC) in patients with idiopathic pulmonary fibrosis (IPF), and to confirm the safety of treatment with pirfenidone compared with placebo in patients with IPF.

Select Inclusion Criteria:

1. Diagnosis of idiopathic pulmonary fibrosis (IPF), consistent with the ATS 2011 Guidelines, of 6-48 months' duration
2. Age 40 to 80 at randomization
3. Percent Forced Vital Capacity (%FVC) ≥50% and ≤90% at screening
4. Percent Carbon Monoxide Diffusing Capacity (%DLCO) ≥30% and ≤90% at screening

Select Exclusion Criteria:

1. Forced expiratory volume in one second (FEV1)/FVC ratio <0.8 after administration of bronchodilator at Screening
2. 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
3. Known explanation for interstitial lung disease
4. History of asthma or chronic obstructive pulmonary disease
5. Active infection
6. Ongoing IPF treatments including investigational therapy, immunosuppressants, and cytokine modulating agents
7. History of unstable or deteriorating cardiac or pulmonary disease (other than IPF) within the previous 6 months

1 year