Find NHLBI Clinical Trials

Search selected NHLBI-supported clinical trials and observational studies by condition, location, or age group. You can also view the complete list of NHLBI-funded studies at


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Do you have chronic bronchitis and COPD and want to improve treatment? This study will be testing how well a medicine called ivacaftor that is used to treat cystic fibrosis works also to treat symptoms of chronic bronchitis. New research suggests chronic bronchitis may be due to a problem similar to cystic fibrosis. To participate in this study, you must be 40 to 80 years old, have a history of smoking, and have not been diagnosed with asthma or cystic fibrosis. This study will be conducted in Birmingham, Alabama.
Adult, Older Adult