Based on The Illustrated Encyclopedia of Healing Remedies, peppermint is an expectorant. But google also says its an astringent; is this true? I can see how both properties of the herb could be beneficial in drying up and expelling coughs, but don’t those two properties counteract each other? Expectorants expel via stimulation of the cilia, while astringents dry things up. I also know that dry and wet coughs should be treated differently. The question is: can expectorants and astringents be most beneficial for a cough, and if so, a dry or wet one or both?