Mullein tea works by reducing inflammation, thereby helping relax the muscles in your respiratory tract. The flowers and leaves of the plant are also used to treat other respiratory ailments, such as tuberculosis, bronchitis, tonsillitis, and pneumonia.
Assisting with common ailments such as coughing, lung weakness, respiratory constriction and chest colds, the mullein plant is truly a lung healing herb. ... This means that the herb helps the body remove excess mucus from lungs and soothes the mucus membranes with its emollient properties.