Educational reference only · Not medical advice · Always consult a qualified healthcare professional
Bugleweed

Lycopus virginicus

Bugleweed

Lamiaceae

Evidence: InsufficientCaffeine Free Northern HemisphereHeart & CalmCirculation TraditionsRelaxation
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Identity

Common Name
Bugleweed
Scientific Name
Lycopus virginicus
Botanical Family
Lamiaceae
Native Region
Northern Hemisphere temperate regions
Cultivation Regions
North America, Europe
Plant Parts Used
Aerial parts
Synonyms
Gypsywort, Water Horehound, American Bugleweed
Caffeine Level
Caffeine Free

A square-stemmed perennial with pairs of deeply toothed lanceolate leaves and tiny white tubular flowers in the leaf axils; the aerial parts are used.

Historical Background

Bugleweed has been a European and North American folk herb for centuries, traditionally sipped for a mild calming effect on the heart and nerves and, in modern times, for overactive thyroid symptoms. Its gentle green brew remains a cautious, practitioner-guided herb.

Earliest recorded uses: European and North American herbal traditions for centuries; a mild calming and thyroid-affecting herb.

Traditional preparations:

  • Aerial-part infusion
  • Practitioner-guided thyroid cup

Traditional Uses

These uses document historical traditions and do not imply proven effectiveness.

European Folk Traditions

Mild calming heart and nerve herb.

Modern Herbalism

Practitioner-guided overactive-thyroid support.

Flavor & Aroma

MildGreenSlightly MintyHerbaceous

Aroma: Mild, green, slightly minty, herbaceous

Tea Information

Suitable for Tea
Yes
Preparation Methods
Infusion, Practitioner-guided use
Steeping Temperature
200 F (93 C)
Steeping Time
5-8 minutes
Recommended Vessel
Teapot
Blends Well With
Lemon Balm, Motherwort, Hawthorn, Honey
200 F (93 C) 5-8 minutes

Safety & Cautions

Contraindications
May affect thyroid function (mild antithyroid) - avoid in hypothyroidism and with thyroid medication; avoid medicinal doses in pregnancy; discontinue before surgery; may slow heart rate.
Drug Interactions
May interact with thyroid medication, beta-blockers, and sedatives; may lower heart rate - consult a clinician before use.
Pregnancy
Avoid medicinal doses; may affect thyroid and heart rate.
Breastfeeding
Avoid medicinal doses; may affect thyroid.
Children
Not recommended for regular use by children.
Allergies
Possible in those sensitive to Lamiaceae; rare.
Known Adverse Effects
Generally well tolerated; high doses may cause GI upset, dizziness, or low thyroid/thyroid effects; may lower thyroid function with prolonged use.

Research Summary

Evidence Level: Insufficient

Bugleweed has a tradition for mild calming and, in modern herbalism, for mild overactive-thyroid symptoms; preclinical work suggests effects on thyroid hormones and heart rate. Clinical evidence is insufficient; it is not a treatment for hyperthyroidism, palpitations, or any disease, and is best used with professional guidance.

Evidence levels reflect the currently available scientific literature and may change as new research emerges. Where evidence is limited or conflicting, this is stated plainly.

References & Sources

References & Sources

  1. EMA HMPC · Lycopi herba assessment (2015)
  2. PubMed · Lycopus review (2019)

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Soothing Brews

An educational encyclopedia preserving the history, traditions, and modern evidence behind herbs used in teas and infusions. Inspired by antique botanical manuscripts.

Steeped in tradition, grounded in honesty.

Please Note

This is an educational reference, not a medical resource. Historical use does not imply effectiveness. Natural does not always mean safe. Consult a qualified healthcare professional before using herbs, especially if pregnant, nursing, or taking medications.

© 2026 Soothing Brews · For educational purposes only.

Preferred sources: NIH ODS · NCCIH · MSK Herbs · PubMed · WHO · EMA · German Commission E · Cochrane