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Motherwort

Motherwort is a common name for the medicinal plant *Leonurus cardiaca*, a perennial in the mint family native to Europe and temperate parts of central Asia.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

Motherwort is a common name for the medicinal plant *Leonurus cardiaca*, a perennial in the mint family native to Europe and temperate parts of central Asia. It has a long history in traditional herbal medicine, especially for heart-related complaints and gynecological uses, but modern evidence for many claimed benefits is limited.

Description

Motherwort is a perennial herb with square stems and small pink to purple flowers typical of the mint family. It is native to Europe and temperate central Asia and has also become naturalized in parts of North America.

Traditional herbal use

Historically, motherwort has been used as a cardiotonic and as a remedy for menstrual, menopausal, and postpartum concerns. It has also been used in folk medicine as a calming herb for nervous tension and palpitations.

Phytochemistry and research

Research has identified several classes of compounds in motherwort, including diterpenes, alkaloids, sterols, and iridoids. Experimental studies suggest antioxidant, anti-inflammatory, antimicrobial, and other biological activities, but these do not necessarily confirm clinical effectiveness.

Safety and cautions

Motherwort is sold as an herbal supplement, but safety concerns include possible uterine stimulation and digestive or sedative effects. It is commonly advised against during pregnancy because of its traditional use in stimulating the uterus.

Motherwort is also known by names such as lion’s tail and lion’s ear. In Chinese herbal medicine, related *Leonurus* species are used under the name *yi mu cao*.

Key facts

  • Motherwort is an herb in the mint family, best known scientifically as *Leonurus cardiaca*.
  • It has been used since ancient times in European herbal medicine, particularly for cardiac and gynecological conditions.
  • Traditional preparations use the aerial parts of the plant, including leaves and flowering tops.
  • Modern reviews describe a range of bioactive compounds and laboratory activities, including antioxidant and anti-inflammatory effects.
  • Many health claims remain insufficiently supported by high-quality clinical evidence.
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Canadian context

Motherwort is sold in Canada as an herbal product and is relevant to Canadian readers through herbal medicine, natural health products, and gardening as an introduced perennial species.

Frequently asked questions

What is motherwort?
Motherwort is a medicinal herb, usually referring to *Leonurus cardiaca*, a perennial plant in the mint family.
Where does motherwort come from?
It is native to Europe and temperate central Asia and has been introduced to other temperate regions, including North America.
What has motherwort traditionally been used for?
It has traditionally been used for heart-related complaints, menstrual irregularities, menopausal symptoms, and nervous tension.
Is there scientific evidence that motherwort works?
Some laboratory and review studies suggest biological activity, but there is limited high-quality clinical evidence for many of its claimed health uses.
Which parts of the plant are used?
The aerial parts, especially the leaves and flowering tops, are typically used in herbal preparations.
Is motherwort safe in pregnancy?
It is commonly advised to avoid motherwort during pregnancy because it may stimulate uterine activity.

References

  1. PubMed Central — https://pmc.ncbi.nlm.nih.gov/articles/PMC6500680/
    Supports: Traditional uses, botanical identity, and classes of bioactive compounds.
  2. Encyclopedia.com — https://www.encyclopedia.com/medicine/encyclopedias-almanacs-transcripts-and-maps/motherwort
    Supports: Native range and status in North America.
  3. WebMD — https://www.webmd.com/vitamins/ai/ingredientmono-126/motherwort
    Supports: Plant family, parts used, and common medicinal uses.
  4. RxList — https://www.rxlist.com/supplements/motherwort.htm
    Supports: Uses, potential side effects, and pregnancy caution.
  5. PeaceHealth — https://www.peacehealth.org/medical-topics/id/hn-2132004
    Supports: Origin, spread, and use of leaves and flowers as medicine.