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Motherwort

traditional use for heart and nervous system support

Evidence · Grade C
Traditional useInteraction risk

Motherwort is an herb traditionally used for heart and nervous system conditions, though scientific evidence for its efficacy, particularly for hyperthyroidism, is currently limited.

Last reviewed June 5, 2026 · AI-assisted, human-reviewed
Motherwort (Leonurus cardiaca) is an herb traditionally used for heart conditions and anxiety. Modern research suggests it may also have a role in managing symptoms of hyperthyroidism, particularly palpitations and anxiety, due to its cardiac-calming and sedative properties.

Quick answer

What it is: Motherwort (Leonurus cardiaca) is an herb traditionally used for heart conditions and anxiety.

May support:Hyperthyroidism

Evidence:Evidence · Grade C

Evidence Summary

Evidence · Grade C

The current evidence grade for motherwort's efficacy is low due to a lack of human clinical trials. Most information is derived from traditional use, anecdotal reports, and preliminary in vitro or animal studies, which do not provide sufficient evidence to support specific health claims.

Last reviewed · Jun 2026

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Why It Works

Motherwort contains alkaloids, flavonoids, and diterpenes that contribute to its pharmacological effects. Its action in hyperthyroidism is thought to involve inhibition of thyroid hormone synthesis or release, and antagonism of TSH receptors, which can reduce thyroid hyperactivity. Additionally, its anxiolytic and cardiotonic effects help alleviate associated symptoms like tachycardia and nervousness.

How it works in more detail

Motherwort contains various compounds, including leonurine, stachydrine, and flavonoids. These compounds are thought to contribute to its traditional uses. For instance, leonurine has been studied for its potential to affect cardiovascular function. However, specific receptor interactions or detailed biochemical pathways for its traditional uses, such as in hyperthyroidism, are not well-established in scientific literature.

How to use

Always consult a qualified clinician.

Editorial guidance

Suggested dosage
For hyperthyroidism symptoms, a common dosage is 2-4 ml of tincture (1:5 in 45% alcohol) three times daily, or 200-600 mg of dried herb extract daily. Always consult a healthcare professional for personalized dosing.
Typical forms
Tincture, Capsule, Tea
Quality markers
When purchasing motherwort, look for products from reputable manufacturers that provide third-party testing for purity and potency. Standardized extracts, if available, may offer more consistent dosing. The botanical name, Leonurus cardiaca, should be clearly stated.
Medication interactions
  • Anticoagulants
  • Antiplatelet drugs
  • Cardiac glycosides
  • Blood pressure medications
Avoid if
  • Pregnant
  • Breastfeeding
  • Taking blood-thinning medications
  • Taking heart medications
  • History of uterine bleeding disorders

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Suggested dosage

For hyperthyroidism symptoms, a common dosage is 2-4 ml of tincture (1:5 in 45% alcohol) three times daily, or 200-600 mg of dried herb extract daily. Always consult a healthcare professional for personalized dosing.

General guidance — discuss specifics with a clinician.

Active medicinal compounds

Leonurine, stachydrine, flavonoids (e.g., rutin, quercetin), diterpenes, iridoids, and phenolic acids.

Traditional use

Motherwort has a long history of use in traditional European and Chinese medicine. It was traditionally employed as a cardiac tonic, for nervous conditions, and to help regulate menstrual cycles. In some traditional systems, it was also used for symptoms associated with an overactive thyroid, though this application lacks modern scientific validation.

Safety

Safety warnings

Motherwort is generally considered safe for short-term use. Side effects can include stomach upset, diarrhea, and uterine stimulation. It may interact with sedatives, blood pressure medications, and anticoagulants.

Avoid if

  • Pregnant
  • Breastfeeding
  • Taking blood-thinning medications
  • Taking heart medications
  • History of uterine bleeding disorders

Medication interactions

  • Anticoagulants
  • Antiplatelet drugs
  • Cardiac glycosides
  • Blood pressure medications

Reported side effects

  • Gastrointestinal upset
  • Diarrhea
  • Uterine stimulation (in high doses)

General guidance — discuss specifics with a clinician.

Evidence ecosystem

Scientific literature, clinical guidance, government sources, ongoing research, traditional use, and lived experience — grouped by source type and quality.

No indexed evidence yet. We're still building out this remedy's evidence ecosystem.

Limitations: A significant limitation is the absence of robust, placebo-controlled human clinical trials to evaluate the efficacy and safety of motherwort for any specific condition, including hyperthyroidism. The existing body of evidence is largely based on historical use and non-human studies, which cannot be directly extrapolated to human health outcomes.

This page is educational. Statements use phrases like "may support" and "has been studied for"because no remedy here is approved to cure, treat, or reverse any condition. Discussion happens on the ailment pages — community statistics here are derived from those reports. Always consult a qualified clinician.

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