This combination of herbs has been used historically to Enhance relieve irritation in the respiratory tract, lungs and bronchial. This is an aid in emphysema as well as other bronchial and lung congestions such as bronchitis, Problem due to narrowing of air passage, tuberculosis, etc. It promotes the discharge of mucus secretions from the bronchopulmonary passages. Thus, Enhanceing to clear the oxygen passageways. This extract is in a base of Pure Vegetable Glycerine.