Ancient Elements Nutrition Respiratory Formula is a unique blend of herbs specifically designed for the lungs and entire respiratory system .its primary uses are to treat respiratory problems such as asthma, bronchitis, flu, and tuberculosis. It is also used to lower fever and as an expectorant to loosen phlegm .A.E.N. Respiratory Formula acts as a respiratory stimulant, expectorant and cough suppressant. It reduces the thickness of the mucus in your lungs and your bronchial tubes, which makes it easier to expel the mucus. This formula can assist in fighting flu-causing viruses.