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Kai-Michael Beeh,1 Jutta Beier,1 Henning Candler,2 Thomas Wittig2 1Insaf Respiratory Research Institute, Wiesbaden, Germany; 2G. Pohl-Boskamp GmbH & Co KG, Hohenlockstedt, Germany Background: Treating symptoms and preventing exacerbations are key components of chronic obstructive pulmonary disease (COPD) long-term management. Recently, a more tailored treatment approach has been proposed, in particular for two well-established clinical phenotypes, frequent exacerbators and chronic bronchitis-dominant COPD. ELOM-080 has demonstrated clinical efficacy in treating symptoms and preventing exacerbations in subjects with chronic bronchitis. However, little is known about the potential effects of ELOM-080 in COPD patients. Aim: To evaluate the effect on exacerbation, cough sputum, and general state of health of long-term treatment with ELOM-080 in COPD patients with an exacerbation history and chronic bronchitis. Methods: We performed a post-hoc analysis of a randomized, double-blinded, placebo-controlled parallel-group clinical trial of a 6-month treatment with ELOM-080 (3×300 mg) in patients with chronic bronchitis and concomitant COPD. The primary outcome was the proportion of subjects with at least one exacerbation over the 6-month study period. Secondary outcomes included the total number of exacerbations (ie, cumulative occurrence of exacerbations during the study period) and the proportion of acute exacerbations necessitating an antibiotic treatment, monthly evaluations of sputum and cough symptoms, and the general state of health and a safety analysis. Results: Of 260 randomized subjects, 64 patients fulfilled the inclusion criteria for COPD (ELOM-080: 35, placebo: 29). Compared to placebo, ELOM-080 reduced the percentage of subjects with at least one exacerbation (29% versus 55%, P=0.031) and a reduction in the overall occurrence of exacerbations (ELOM-080: 10, placebo: 21, P=0.012) during the winter season. The percentage of asymptomatic or mildly symptomatic patients (sputum/expectoration and cough) was consistently higher in the ELOM-080 group compared to placebo, with statistical significant differences after 2 and 3 months of treatment (2 months: ELOM-080 25%, placebo 11%, P