Black horehound is a native of Europe, but is now naturalized in America. It has an unpleasant taste and the odor is disagreeable.
All that has been written for the white horehound also applies to the black horehound, except that in some conditions the black is preferable.
It is useful in amenorrhea, mennorhagia, dysmenorrhea, gravel, dropsy, coughs, hoarseness, bronchitis, consumption, and weak stomach.
It is considered almost a specific in biliousness, bilious colic, regurgitation of food and sour stomach.
Adding marshmallow, hyssop, and elecampane will enhance its use in lung affections and in troubles of the respiratory organs, especially if blood is expectorated. This will also act as an alterative and tonic to the mucous membranes; the mucous secretions will be influenced, irritated surfaces assisted, and the sharpness of the discharge corrected.
Adding mother-wort will tone the uterine membrane.
It may be used in infusion, decoction, powder or pills.