Kasa (Bronchitis) is prevalent all over the world and certainly most common respiratory ailment. Chronic bronchitis is a progressive, recurring inflammation of the lower airways of the lungs called the bronchi and the bronchioles. The hallmark of chronic bronchitis is a persistent productive cough and difficulty with breathing that slowly gets worse over time. Chronic bronchitis is a kind of chronic obstructive pulmonary disease (COPD). The symptoms of chronic bronchitis include shortness of breath, a loose cough that produces large amount of mucus, and chest tightness. Complications of chronic bronchitis can be serious and even life threatening. There is no cure for chronic bronchitis. The goal of treatment is to relieve symptoms and prevent complications. Ayurveda had not only mentioned Kasa as a symptom in various diseases but also described it as an independent Vyadhi (disease) with its separate pathogenesis, symptoms, signs, types and treatment. Ayurveda believes that it is a Kapha Dosha dominating disease. Ayurveda describes five types of cough (Kasa). Characteristic features of chronic bronchitis are similar to Kaphaja Kasa (type of Kasa) in the Ayurvedic science. Ayurvedic compound formulation, Talisadi churna is described in the Sharngadhara Samhita, Madhyama Khanda, Adhyaya 6/130-133½ for the successful treatment of Kasa (Chronic bronchitis) since ancient times. In the present study 75 patients of Kasa (Chronic bronchitis) will be studied. The aim of this study is to assess the clinical efficacy of Talisadi Churna in the management of Kasa (Stable Chronic Bronchitis).The observations and discussion will be made according to statistical analysis on different clinical parameters esp. pulmonary function test and scores of questionnaires (St. George’s Respiratory Questionnaire & Leicester Cough Questionnaire).