Clinical Efficacy and Safety of Pirfenidone in Patients With Idiopathic Pulmonary Fibrosis (IPF)

Inclusion Criteria:

1. Written informed consent signed;
2. Age ≤75 years;
3. Clinically or multidisciplinary diagnosed idiopathic pulmonary fibrosis(see 2011 guidance );
4. Resting state PaO2≥50mg, FVC%≥45% normal predicted value and DLCO≥30% normal predicted value.

Exclusion Criteria:

1. Allergic to pirfenidone;
2. Patients with serious Significant pulmonary infection need anti-infection treatment;
3. Patients who has taken interferon, penicillamine or other agents for the treatment of IPF;
4. Patients who has taken prednisone(≥50mg) or other glucocorticoid in the past 1 month;
5. Patients who has taken immunosuppressants in the past 1 month;
6. Patients who has taken amiodarone which may cause pulmonary fibrosis in the past 3 months;
7. Patients with malignant tumor in the past 5 years;
8. Participated in other clinical trials in the past 3 months;
9. Patients with serious heart disease(NYHA class Ⅲ-Ⅳ), liver disease(ALT or AST 2 times above the upper level of normal value range), kidney disease(Cr above the upper level of normal value range);
10. Pregnant or lactating women;
11. The investigator assessed as inappropriate to participate in this clinical trial.