This amazing blend seems to work well for both wet and dry coughs as well as productive and unproductive coughs. Marshmallow soothes irritated mucus membranes and hydrated tissue, allowing fluids to move. Elecampane is both a cough suppressant and expectorant. Licorice adds antiviral properties, coats the throat and is used as an expectorant to clear congestion from the lungs and bronchial tubes and help bring up phlegm. Boneset helps to expel excess mucous and adds more anti-viral activity.