About 20-40{894ce28044f47b993de3789f3611ec30e6a7e9946481578147fefbff2b63ec4d} of adults with COPD symptoms but who aren’t diagnosed with COPD use these types of long-lasting inhalers — ScienceDaily

Researchers supported by the National Institutes of Health have found that dual bronchodilators — long-lasting inhalers that relax the airways […]