Mullein leaf, also known as Verbascum thapsus, is a medicinal plant that has been used for centuries to treat a variety of ailments. One of the main uses of mullein leaf is for respiratory issues. It has anti-inflammatory properties that can help to reduce inflammation in the airways and ease coughing. It is also believed to have expectorant properties, which can help to loosen mucus and make it easier to cough up.

Mullein leaf may also have antimicrobial properties, making it useful for treating infections. It has been traditionally used to treat ear infections, as well as skin infections and wounds.