Horehound: Ever heard of it?

Abstract

White horehound, also known as Marrubium vulgare, is a perennial plant that is part of the mint family. Although there are two other commonly known types of horehound, white horehound is the variety that is most used as an herbal supplement. While horehound may not sound like a familiar supplement, it is often an ingredient used in cough drops, lozenges, and tea blends that are sold to ease sore throats (e.g., Ricola herbal drops).