Motherwort Herb (Leonurus cardiaca): The Heart and Uterine Herb

Motherwort — Leonurus cardiaca — carries its clinical indications in its very name: Leonurus (lion heart) and cardiaca (of the heart). This tall, bitter, somewhat unassuming mint-family herb of roadsides and waste ground is one of the most specific cardiac nervines in the Western materia medica — used for the “nervous heart” (palpitations, tachycardia, and anxiety-driven cardiac symptoms) and for the uterine cramping and menstrual irregularity that gave it the additional common name “Motherwort.”

At Herba Naturalle, Motherwort is listed in the comprehensive herb index as a cardiac and female reproductive herb — complementing the Shatavari Complex for female hormonal support and the Nervous System Reset for nervous system calming.

Active Compounds

Iridoid glycosides — leonurine (a partial agonist at serotonin receptors); with uterotonic, antispasmodic, and hypotensive activity
Alkaloids — stachydrine and betonicine; with uterine-toning and antiplatelet activity
Flavonoids — quercetin, apigenin, rutin; antioxidant, anti-inflammatory, and mild cardiac-supportive
Tannins — mild astringent action
Diterpenes — leocardin; with cardioprotective activity

Clinical Applications

Cardiac Palpitations and Nervous Heart

The primary and most specific application. Motherwort is the classic herb for functional palpitations — the awareness of the heartbeat, irregular beats, or rapid heart rate associated with anxiety, nervous tension, and sympathetic nervous system overdrive. The alkaloid stachydrine has mild antiarrhythmic effects and the leonurine reduces cardiac excitability. Relevant to Healing the Heart.

Anxiety and Nervous Tension

The flavonoid apigenin (GABA-A receptor binding) and the overall nervine action of Motherwort provide anxiolytic support — particularly appropriate where anxiety manifests with cardiac symptoms. Supports the nervous system work described in Inflammation of the Surface Nervous System: Where Healing Begins.

Menstrual Regulation and Uterine Tonic

Leonurine and stachydrine have mild uterotonic activity — promoting regular, efficient uterine contractions. Used for irregular, delayed, or absent periods (amenorrhoea), and for the anxiety-driven menstrual disruption where the nervous and reproductive systems are both involved. Relevant to Stop the Inflammation Pandemic: Inflammation in the Female Reproductive System.

Thyroid Palpitations

Used in hyperthyroid-associated palpitations — reducing the cardiac excitability of thyroid excess.

Relevant Blog Posts

Safety

Pregnancy: Contraindicated — the uterotonic alkaloids may cause miscarriage or preterm labour
Cardiac medication: Professional guidance essential — may interact with antiarrhythmic drugs, cardiac glycosides, and blood pressure medication
Anticoagulants: Stachydrine has antiplatelet activity

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

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