You can search for trials, but you probably can't join any because the 1% Treaty hasn't passed yet. Most trials are severely limited by lack of funding and bureaucratic barriers. Help change this!
Active Clinical Trials
2 active trials recruiting for Roflumilast in Chronic Bronchitis
Comparative Effectiveness of Roflumilast and Azithromycin in Reducing Exacerbations in Severe Chronic Obstructive Pulmonary Disease ( COPD ) Patients With Chronic Bronchitis Phenotype