White Horehound Herb (Marrubium vulgare): The Classic Cough Herb

White Horehound — Marrubium vulgare — is one of the oldest cough remedies in recorded medicine, mentioned by Dioscorides, Pliny, and in the works of numerous medieval European herbalists. Horehound lozenges and candies were among the most widely used cough remedies in Britain and America through the 19th and early 20th centuries, and horehound preparations remain in clinical herbal use today as one of the most reliable expectorant and respiratory bitter herbs available.

At Herba Naturalle, White Horehound is listed in the comprehensive herb index as a primary respiratory expectorant and bitter herb — complementary to the Lungwort Plus.

Active Compounds

• Diterpene lactones (marrubiin) — the primary active compound; both the primary bitter constituent and the primary expectorant — marrubiin directly stimulates bronchial mucus secretion and promotes mucociliary clearance; also has antiarrhythmic properties
• Flavonoids — luteolin, quercetin; anti-inflammatory
• Alkaloids (stachydrine) — with antispasmodic and mild cardiovascular activity
• Volatile oil — camphene, sabinene; minor antimicrobial contribution
• Tannins — astringent

Clinical Applications

Bronchitis and Productive Coughs

The primary application. Marrubiin specifically stimulates respiratory mucus secretion and clearance — making White Horehound one of the most direct expectorants available. Used for bronchitis with difficult-to-clear mucus, dry hacking coughs, and the persistent cough following respiratory infection.

Respiratory Bitter and Tonic

As a bitter herb, White Horehound also stimulates digestive secretions — making it applicable in respiratory conditions with a digestive component (the classically described “damp, phlegmatic” constitution in traditional humoral medicine).

Cardiac Antiarrhythmic (Traditional)

Stachydrine and marrubiin have mild antiarrhythmic properties — White Horehound was traditionally used for functional palpitations and cardiac irregularity, though this application requires professional clinical assessment.

Relevant Blog Posts

• Stop the Inflammation Pandemic: Breathe Easy – Inflammation in the Nose, Sinuses, and Lungs
• Stop the Inflammation Pandemic: The Digestive System (Part 1)
• Healing the Heart: Understanding and Reversing Inflammation in the Cardiovascular System
• Stop the Inflammation Pandemic – The Lymphatic System
• Welcome to the Final Episode of the Inflammation Pandemic Series

How to Use

• Tea: 2g dried herb steeped 10 minutes; 2–3 cups daily; bitter but effective
• Tincture (1:3): 2–4ml three times daily
• Horehound candy/lozenges: Traditional preparation for sore throat and cough

Safety

• Generally well tolerated
• Pregnancy: Avoid — stachydrine has oxytocic activity
• Cardiac medication: The mild antiarrhythmic stachydrine content — professional guidance alongside cardiac drugs

Contact Herba Naturalle for respiratory herbal support. Browse all products and the full herb index.

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This article is for informational purposes only. Please consult a qualified medical herbalist before use.