Clinical Research Directory
Browse clinical research sites, groups, and studies.
2 clinical studies listed.
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Tundra lists 2 Bronchitis, Chronic clinical trials. Each listing includes eligibility criteria, study locations, and direct links to research sites in the Tundra directory.
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NCT00608764
Examining the Genetic Factors That May Cause Chronic Obstructive Pulmonary Disease (COPD)
Chronic obstructive pulmonary disease (COPD) is a long-term lung disease that is often caused by cigarette smoking. The purpose of this study is to evaluate whether certain genetic factors predispose some smokers to develop COPD more than others.
Gender: All
Ages: 45 Years - 80 Years
Updated: 2026-10-21
13 states
NCT07873632
Study to Evaluate the Effects of Oral Glyceryl Guiacolate (Guaifenesin, GGE) on Sputum Rheology in Subjects With Mucus Hypersecretion
A Randomized, Dosing vs Standard of Care, Single-Center, Multiple Dose Study to Evaluate the Effects of Oral Glyceryl Guiacolate (Guaifenesin, GGE) on Sputum Rheology in Subjects With Mucus Hypersecretion
Gender: All
Ages: 40 Years - 75 Years
Updated: 2026-10-14
1 state