Roflumilast or Azithromycin to Prevent COPD Exacerbations (RELIANCE)

A multi-center, randomized, 72-month, parallel- group, non-inferiority, phase III study to compare the effectiveness of roflumilast (Daliresp, 500 mcg quaque die (QD) or alternate regimen) therapy versus azithromycin (250 mg QD, 500 mg QD three times per week, or alternate regimen) to prevent hospitalization or death in a patients at high risk for COPD exacerbations.