Horehound (Marrubium vulgare) has long been known as a soothing syrup and tonic candy. Horehound candy was sold in most grocer’s shops during the Victorian era and it was a big favorite with children back then. It was also a well-known throat and lung remedy. As an expectorant, Horehound works to treat coughs and colds. It affects the body’s respiration directly by dilating vessels. Singers use Horehound to sustain their vocal cords and it helps with hoarseness.