Should I Use Mullein Leaf to Clear Out My Lungs? Banner Health Herb Pharm Mullein Liquid Herbal Extract 1 fl oz Walmart.com I was looking for a natural way to ease my cough and cut down on vaping, and this mullein diffuser pen has been a game changer. The light, floral sweetness is incredibly smooth and satisfying, making So my daughter got me this Mullein aromatherapy inhaler thing (basically like a vape) and I really like it so far. Contains no tobacco or nicotine. Mullein is good for removing mucus