Mullein is an expectorant, which means it helps the body expel excess mucus, usually by helping make your coughs more productive, to bring up mucus that may be settling in the chest or in the throat. 
It is also a demulcent. Studies show that demulcents create a soothing anti-inflammatory coating over mucous membranes. 
Mullien is a great choice for those with respiratory issues. Such as asthma, bronchitis and congestion due to common cold & flu symptoms.
Take 1-2 capsules per day.