
Marrubium vulgare
Also known as Horehound, Hoarhound, Common Horehound, Common Hoarhound, Marrubium, lozenges, syrup, tea.
Traditional use for ≥30 years Ph. Eur. standardized to ≥0.7% marrubiin Bitter taste masked with honey Synergistic with Elecampane (Inula helenium) Risk of adulteration with Ballota nigra For adults/adolescents >12 years Consult MD if symptoms persist >1-2 weeks or for biliary/peptic issues HMPC Assessment

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Ask HerbertChronic irritation of the bronchial membrane with cough and catarrh.
Pregnancy: Use with care in pregnancy
The record lists 8 contraindications; open the plate in the library to read them in full.
| Preparation | As written | Metric |
|---|---|---|
| Powdered herb | 225-450mg TID (daily 0.675-1.35g) | 225-450 mg |
| Tincture (1:5, 25% EtOH) | 3-6ml TID | 3-6 mL |
| Fluid extract (1:1, 20% EtOH) | 1-2ml TID | 1-2 mL |
| Liquid extract (1:0.9-1.1, 20-30% EtOH) | 1.5-4ml TID | 1.5-4 mL |
| Expressed juice (DER 1:0.7-0.9) | 10-20ml TID | 10-20 mL |
| Syrup | 2-4ml | 2-4 mL |
Doses are reproduced from the sources for practitioners and are not a recommendation for any person.
Clinical Notes. Traditional use for ≥30 years Ph. Eur. standardized to ≥0.7% marrubiin Bitter taste masked with honey Synergistic with Elecampane (Inula helenium) Risk of adulteration with Ballota nigra For adults/adolescents >12 years Consult MD if symptoms persist >1-2 weeks or for biliary/peptic issues HMPC Assessment
Clinical Notes. Traditional use supported by /ESCOP for cough/expectorant and mild dyspepsia Duration limited to 1-2 weeks Consult doctor for persistent symptoms or gallstones ESCOP
Action and Therapy. Hoarhound is a stimulating expectorant and tonic, and is adapted to both acute and chronic irritation of the larynx and bronchial tract, and gives added power to respiration. In small doses it is a gastric tonic of considerable value, but given too freely it will act as an emetic and cathartic.
Properties and Uses. This herb is stimulating and relaxant, acting rather diffusively, but leaving behind a permanent impression which is somewhat tonic and astringent. The skin and mucous membranes are chiefly affected by it; and it is a longtime family remedy in recent colds and catarrhal coughs.
Drawn from Cook's Physio-Medical Dispensatory; Scudder's Specific Medication and Specific Medicines; King's American Dispensatory, 18th edition (Felter and Lloyd); Felter's Eclectic Materia Medica, Pharmacology and Therapeutics, and the Bountiful Herbs editorial.
White Horehound stands in 3 documented formulas in the library, among them Syrupus Marrubii Compositus, Compound Syrup of Hoarhound.

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