Mugwort
Artemisia vulgaris L. · Asteraceae · aerial parts (leaf and flowering top); Chinese medicine uses the leaf of A. argyi
Also known as common mugwort, felon herb, St. John's plant, cronewort, chrysanthemum weed, sailor's tobacco, Beifuss (German), armoise (French); Nagadamani in Ayurvedic texts; Ai Ye in Chinese medicine (the leaf of the related Artemisia argyi, source of moxa); yomogi in Japan (A. princeps)
- Warm
- Bitter
- Pungent
- Drying
- Bitter digestive
- Emmenagogue
- Nervine
- Oneirogen (dream-enhancing)
- Hemostatic (charred leaf, Chinese medicine)
- Anthelmintic (traditional)
Educational content, not medical advice. Nothing on this page is a substitute for care from a qualified healthcare provider. Do not stop or change a prescribed medication based on anything you read here. Mugwort acts on the uterus, belongs to a plant family that causes allergies, and contains thujone in some chemotypes, so talk with your doctor or pharmacist before using it beyond a cup of tea, and do not use it in pregnancy. This page is part of the free Ivy Herbal materia medica.
What Is Mugwort?
Mugwort is the flowering top of Artemisia vulgaris, a tall perennial in the daisy family, Asteraceae, which it shares with echinacea and ragweed. The genus Artemisia holds more than 500 species and takes its name from Artemis, the Greek goddess associated with childbirth. Medieval Europe called this plant mater herbarum, the mother of herbs.1 It is used as a bitter for digestion, as a warming herb for the menstrual cycle, as a mild nervine, and, in Chinese medicine, as the leaf that is burned in moxibustion. Every one of those uses is covered below with its sources.
Where mugwort grows
Native to Europe and Asia, now found on every continent except Antarctica, on roadsides, riverbanks, field edges, and waste ground. It came to North America with European settlers around the 16th century and is now classed as an invasive weed across much of the continent, spreading by root fragments that survive tilling.1 Here in Montana the plant you are more likely to meet is a native cousin, Artemisia ludoviciana, called western mugwort or white sagebrush, which King's American Dispensatory records the Paiute using for nosebleed and to ease labor.4 Big sagebrush, A. tridentata, is also an Artemisia. True sage is a different genus, Salvia, and the two are not interchangeable; see the sage monograph for that plant.
Types of mugwort
Several species travel under the mugwort name, and the medicine changes with the species.
- Common mugwort, A. vulgaris. The European and North American plant, and the subject of this page.
- Chinese mugwort, A. argyi. The pharmacopoeial source of Ai Ye and of moxa. Its chemistry overlaps closely with A. vulgaris, which is why Western writers often treat them as one plant.5
- Japanese mugwort, A. princeps, called yomogi. Eaten as a spring green in Japan and Korea, where young leaves color kusa mochi and ssuk rice cakes, and used in Korean skincare as an extract for reactive skin. Culinary and cosmetic use, not the medicinal species of this page.1
- California mugwort, A. douglasiana. Once classed as a variety of A. vulgaris; the species in the Chumash record below.1,6
- Western mugwort, A. ludoviciana. The native Montana species, with its own Indigenous record.4
- Wormwood, A. absinthium. A relative, far more bitter and far higher in thujone. Do not substitute it for mugwort. The comparison is below.7
- Sweet wormwood, A. annua. The source of the malaria drug artemisinin. Most "Artemisia" research online refers to this species or to the isolated drug, not to mugwort.7
Who has used it
- Greek and Roman medicine. Dioscorides, Pliny, and Galen all described it in the first and second centuries, mainly for the womb and the urinary tract.1
- European folk and monastic medicine. Used for cold digestion, worms, delayed menses, fever, and tired legs, and hung on the door at midsummer against misfortune.1,2
- Chinese medicine. Ai Ye appears in the classical formula Jiao Ai Tang and is the material burned in moxibustion.5
- Unani and Ayurvedic practice. Named in several compound preparations for the liver and for painful periods.1
- Indigenous North America. The Chumash of coastal California used A. douglasiana for menstrual cramps, menopause, and sleep; the Paiute used A. ludoviciana in labor.4,6
How to Identify Mugwort
Mugwort has one field mark that settles most cases: turn a leaf over. The top is dark green, the underside is white with dense felt. Check that first, then the rest.
What mugwort looks like
- Height and stem. 3 to 6 feet tall by late summer, on angular, grooved stems that are often purple-tinged and turn woody at the base with age.1
- Leaves. Deeply cut into pointed lobes, 2 to 4 inches long, dark green on top, white-woolly beneath. Lower leaves are larger and more divided; upper leaves are smaller and simpler.1,2
- Flowers. Small, dull yellow to reddish brown, without visible petals, packed into branched spikes at the top of the plant from July into September. They are wind-pollinated, which is why the pollen is a major late-summer allergen.1,3
- Smell and taste. The crushed leaf smells sharp and resinous, close to sage with a camphor note. The taste is bitter and spicy, milder than wormwood.1
- Habit. Grows in dense colonies from creeping roots, on disturbed ground, roadsides, and riverbanks.1
Young mugwort in spring
The plant that gets misidentified is the spring shoot, before it has height or flowers. Look for a low rosette of divided leaves rising from last year's dead stalks, often with a reddish tinge to the stems, and again check the white underside. Young mugwort is the stage gathered as a green in Japan and Korea, and the stage with the mildest flavor. By the time it flowers, the leaf is tougher and more bitter, and the aerial parts are harvested just as flowering begins for medicinal drying.1
Mugwort vs wormwood
Both are Artemisia and both are bitter, and that is where the resemblance ends for practical purposes. Wormwood, A. absinthium, is silver-gray and silky on both leaf surfaces, shorter, and intensely bitter to the point of numbing the tongue. Its essential oil carries far more thujone, which is why it is the plant behind absinthe's reputation.7,15 Mugwort is green on top and white beneath, taller, and only moderately bitter. Wormwood is a stronger bitter digestive; mugwort is the gentler plant with the menstrual and nervine reputation. They are not interchangeable in a formula.
Mugwort vs motherwort
The names sound alike and both are traditional women's herbs, and the plants share nothing else. Motherwort, Leonurus cardiaca, is in the mint family: square stem, opposite leaves shaped like a hand with three to five lobes, pink flowers in whorls up the stem, and no white felt under the leaf. Mugwort is a daisy-family plant with round stems, alternate leaves, and the felted underside. Motherwort has a different chemistry (alkaloids and iridoids) and a different safety picture, so a mix-up matters.
Look-alikes at a glance
| Plant | Leaf underside | Stem | Smell | Family |
|---|---|---|---|---|
| Mugwort, A. vulgaris | White felt; green on top | Round, grooved, often purple | Sage-like, resinous | Asteraceae |
| Wormwood, A. absinthium | Silver-silky on both sides | Silver, ridged | Sharper; intensely bitter taste | Asteraceae |
| Western mugwort, A. ludoviciana | White-woolly on both sides | White-woolly | Sage-like | Asteraceae |
| Motherwort, Leonurus cardiaca | Green, hairy, no felt | Square (mint family) | Faint, green | Lamiaceae |
| Ragweed, Ambrosia artemisiifolia | Green, fine hairs, no white felt | Round, hairy | Little | Asteraceae |
Traditional Uses of Mugwort
The traditions below describe how practitioners have used mugwort. These are historical and cultural records, not instructions. None of this is medical advice.
Energetics
Every tradition reads mugwort as warm and dry, with a bitter and aromatic taste. Western herbalists use it where digestion is cold and sluggish, where menstruation is scanty or painful from cold, and where the nervous system needs a mild lift. The same warmth makes it a poor fit for hot, dry, irritable constitutions. Chinese medicine classes Ai Ye as bitter, acrid, and warm, entering the liver, spleen, and kidney channels, and cautions against it where heat comes from yin deficiency.2,5,8 For warming herbs that pair with it in that pattern, see the ginger and cinnamon monographs.
Western herbalism
Culpeper assigned mugwort to Venus and to women's complaints. Grieve, writing in 1931, put its effect on the nervous system ahead of its diuretic and sweat-promoting actions, and gave a covered infusion for fevers and colds, taken warm, or cold as a bitter tonic.2 The British Herbal Pharmacopoeia lists poor appetite, nervous indigestion, and intestinal worms as its indications.9 David Hoffmann describes it as a bitter and carminative that supports digestion on two fronts at once, with a mild nervine action he attributes to the volatile oil, and calls it specific for painful periods and for absent periods without a structural cause.8 Nineteenth-century Thomsonian practice in England used a strong mugwort decoction as a steam sitz bath for period pain.10
The Eclectic physicians of the 1800s paid it less attention than its cousin wormwood. King's 1854 dispensatory says A. vulgaris "has been reputed beneficial in epilepsy, hysteria, and amenorrhea," and the 1898 edition adds that the root was the German remedy for those conditions. The 1918 United States Dispensatory repeats the German epilepsy and chorea use.4,11,12 None of them list a dose for mugwort itself, and none of the seizure uses have been tested.
Mugwort and dreams
A separate thread runs through European and North American folk use: mugwort under the pillow, in tea before bed, or smoked, to bring vivid and memorable dreams. The 2024 narrative review on dream induction records that reputation and notes that no trial has tested it.13 My Dream Boost tea draws on that tradition.
Folklore and spiritual meaning
The names tell the history. St. John's plant and cingulum Sancti Johannis, St. John's girdle, come from the midsummer custom of wearing a belt of mugwort and then burning it, for protection through the coming year. Sailor's tobacco and felon herb record its use as a smoking substitute and a poultice for infected fingers. Travelers put it in their shoes against fatigue, a use Pliny recorded. Dioscorides linked it to Artemis and to the rites of Isis and Diana, and the plant kept that association with women's mysteries and protection through the medieval period.1,2 I include this as cultural history; it is not a claim about what the plant does.
Chinese medicine: Ai Ye
Bensky's Chinese Herbal Medicine: Materia Medica gives Ai Ye three actions: it warms the womb and stops bleeding, it disperses cold and alleviates pain, and it eliminates dampness and stops itching. The bleeding it addresses is the cold, deficient type, such as prolonged menstrual flow or spotting in early pregnancy, and for that use the leaf is charred first. For cold-type cramps it is used plain or vinegar-processed. Decocted and applied as a wash, it is used for damp, itchy skin conditions. Ai Ye is also the herb aged and rolled into moxa, the wool burned over acupuncture points.5 Chinese sources record the fresh leaf as gentler and less warming than the dried, and the dry-fried leaf as hot.5 Another Chinese herb on this site with a blood-moving reputation, dan shen, sits on the opposite side of the same question: it moves blood where Ai Ye restrains it.
Two points from this tradition reappear in the safety section. First, Ai Ye is used within Chinese practice for threatened miscarriage, while Western texts contraindicate mugwort in pregnancy. Second, the same leaf both stops bleeding and, in Western use, brings on a delayed period. The Chinese answer is that the charred leaf restrains and the raw leaf moves; the Western answer is that mugwort regulates a cold, stalled cycle rather than forcing flow. Neither answer has been tested in people.
Unani and Ayurvedic practice
Ekiert's review lists several Unani preparations that include mugwort for liver congestion, enlarged spleen, and chronic fever, and a decoction taken for painful menstruation. Ayurvedic sources give a single dose of the dried herb or liquid extract at 0.5 to 2 g.1 Mugwort does not appear in Sebastian Pole's Ayurvedic Medicine, so I have no primary Ayurvedic monograph to cite for dosha effects.
The Chumash of California
James Adams and Cecilia Garcia, writing in 2006, describe Artemisia douglasiana as a Chumash remedy for painful periods, menopause, and sleep, and the related A. californica as a liniment for pain.6,14 These are ethnobotanical records rather than trials, and Adams practices the tradition he writes about, which the research section notes.
Constituents and What They Do
Mugwort's chemistry varies more from place to place than almost any herb on this site. Ekiert's review found that plants from India and Morocco carry essential oil dominated by thujone, while German plants run on sabinene and cineole with little thujone at all. The figures below come from that review and describe the range, not a single plant.1 Where a constituent is said to do something, the evidence is laboratory or animal work unless stated otherwise.
| Constituent | Amount | What studies show |
|---|---|---|
| Essential oil (1,8-cineole, camphor, borneol, sabinene, caryophyllene, and in some chemotypes thujone) | Highly variable; thujone from 0 to over 20 percent of the oil depending on origin | Carries the aroma and the carminative (gas-relieving) quality. Inhibited bacteria and Candida in the test tube. Thujone is the safety-limiting compound; see Safety.1,15 |
| Sesquiterpene lactones (vulgarin, psilostachyin, yomogin) | Vulgarin about 0.15 percent of dry weight | Provide the bitterness that stimulates digestive secretions. Yomogin blocked histamine H1 receptors and relaxed intestinal and airway smooth muscle in guinea pig tissue.1 Artemisinin has been detected in some samples at 0 to 2.3 percent, which is too inconsistent to make mugwort a source of it.1 |
| Flavonoids (quercetin, luteolin, apigenin, eriodictyol, jaceosidin) | Milligrams per kilogram; eriodictyol and luteolin highest at about 40 mg/kg | Inhibited mouse brain monoamine oxidase in the test tube, the enzyme that breaks down serotonin and dopamine. Eriodictyol and apigenin activated the human estrogen receptor in a yeast assay at about 5 percent the strength of estradiol.1 |
| Coumarins (esculin, umbelliferone, scopoletin) | Not quantified | Scopoletin and esculetin also inhibited monoamine oxidase in the same mouse enzyme study. Plain coumarins of this type are not blood thinners.1 |
| Caffeoylquinic acids (chlorogenic acid relatives) | Up to about 1.1 percent of dry weight for the main one | Account for most of the antioxidant activity measured in water extracts. The European Pharmacopoeia standardizes homeopathic mugwort tincture on these compounds.1 |
| Tannins | Present, not quantified | Add astringency and are the likely basis of the traditional hemostatic and wound uses.1 |
| Prunasin (a cyanogenic glycoside) | Trace | Reported in the plant. No case of harm from it has been documented at herbal doses.1 |
| Pollen proteins (Art v 1, Art v 3, Art v 4) | In pollen, not in leaf preparations | Art v 1 is the major mugwort pollen allergen and the sensitizer behind mugwort-celery-spice syndrome. Relevant to anyone with late-summer hay fever.3,16 |
What the Research Shows
Taken together, the human evidence on mugwort concerns one preparation, moxibustion, in which the leaf of A. argyi is burned near the skin rather than swallowed. Those trials support a modest effect on turning breech babies and on period pain, with the limits noted below. No randomized trial has tested mugwort tea, tincture, or capsules in people for any condition. The digestive, antispasmodic, estrogenic, and monoamine oxidase findings all come from animals, isolated tissue, or the test tube. Antiviral and anticancer claims attached to the genus rest on laboratory work, mostly with other species or with isolated artemisinin, and do not transfer to mugwort. Ekiert's 2020 review is the most complete summary and is the source for the laboratory studies below.1,7
Moxibustion for breech presentation
- Design: systematic review of 13 randomized or quasi-randomized trials, 2,181 pregnant women with a breech baby, comparing moxibustion at the acupuncture point BL67 on the little toe, with or without usual care, against usual care alone or sham moxibustion.
- Findings: moderate-certainty evidence that moxibustion plus usual care probably reduces the number of babies still non-head-down at birth. Evidence on the need for a manual turning procedure was uncertain. One trial suggested less oxytocin use in labor.17
- Dose: typically one or two sessions a day of 15 to 20 minutes over one to two weeks from about 33 weeks of pregnancy; protocols varied.
- Limitations: participants cannot be blinded to a burning stick, most trials were small, results were more consistent in Asian populations, and at least one well-run European trial found no effect. One review author was an investigator on an included pilot study; the other two authors handled that study's assessment. This is a pregnancy intervention that belongs with a midwife or obstetrician, not a home experiment.
Moxibustion for period pain
- Design: pragmatic randomized trial in China; 152 women with primary dysmenorrhea (period pain without a diagnosed pelvic cause) were assigned to moxibustion at abdominal and leg acupuncture points or to a conventional pain medication, over three menstrual cycles. 133 completed the trial.
- Findings: pain scores fell from about 6.4 to 2.5 out of 10 in both groups, with no meaningful difference between moxibustion and the drug at the end of treatment.18
- Dose: moxa stick held near the skin for 30 minutes per session, in the days before and during menstruation.
- Limitations: no placebo or sham group, so the trial cannot separate the moxa from expectation or from the natural swing in period pain month to month. Open-label. Both arms improving equally is consistent with either treatment working or with neither doing much beyond attention. No industry funding reported.
Antispasmodic and airway-relaxing effects
- Design: crude extract applied to strips of rabbit intestine and guinea pig windpipe in a bath, plus a mouse diarrhea model. A separate Philippine team isolated yomogin from a chloroform extract and tested it on guinea pig ileum.
- Findings: the extract relaxed both gut and airway muscle through a combined anticholinergic and calcium-channel-blocking action, at concentrations from 0.03 to 10 mg/mL. Yomogin blocked histamine H1 receptors in the ileum.1
- Dose: tissue-bath concentrations; no human dose can be derived from them.
- Limitations: isolated organ strips and mice. These results explain the traditional carminative and antispasmodic reputation at the level of mechanism only. No human trial exists.
Monoamine oxidase inhibition and the dream reputation
- Design: a South Korean team isolated eight flavonoids and coumarins from an 80 percent ethanol extract of whole mugwort and tested each against monoamine oxidase taken from mouse brain. The 2024 review surveyed substances proposed to induce lucid dreams.
- Findings: all eight compounds inhibited the enzyme, quercetin most strongly at an IC50 of 1 micromole. The review lists mugwort among traditional dream herbs, suggests its MAO inhibition and possible acetylcholinesterase activity as a mechanism worth studying, and states that no trial has tested it.1,13
- Dose: none applicable.
- Limitations: enzyme in a dish, with compounds at concentrations a cup of tea would not reach in the brain. The dream effect remains a tradition with a plausible mechanism and zero clinical data.
Estrogen receptor activity and anti-implantation effects
- Design: a polar extract and individual flavonoids were tested in yeast engineered with the human estrogen receptor. Separately, an Indian team gave leaf extract to female rats and measured pregnancy outcomes.
- Findings: the extract showed about 5 percent of the estrogenic activity of estradiol; eriodictyol and apigenin were the active flavonoids. In rats, the leaf extract showed strong anti-implantation and estrogenic activity.1
- Dose: rat doses; not reported in the review.
- Limitations: yeast and rats. The relevance is to safety in pregnancy and conception, where this animal finding lines up with the traditional emmenagogue use, not to any therapeutic claim.
Chumash women's health and the mugwort liniment
- Design: two ethnobotanical papers by a pharmacology professor and a Chumash healer, recording traditional uses and, in the 2005 paper, a series of pain patients treated with a liniment made from the plant.
- Findings: A. douglasiana tea is recorded for period cramps, menopause, and sleep. The liniment is reported to relieve pain within a minute or so of application; the authors attribute this to monoterpenes in the volatile oil acting on skin pain receptors.6,14
- Dose: topical, applied daily; tea quantities not specified.
- Limitations: no control group, no blinding, self-reported outcomes, and the senior author practices and teaches the healing tradition he describes, which is a conflict of interest even without money involved. Valuable as a record of use, not as proof of effect.
Is moxa smoke safe to breathe?
- Design: smoke from burning moxa was analyzed for the compounds regulated in cigarette smoke: tar, carbon monoxide, polycyclic aromatic hydrocarbons, aromatic amines, formaldehyde, and others.
- Findings: at concentrations well above normal clinic exposure, only a few aromatic amines exceeded permitted limits, and only when results were extrapolated to long-term daily use. The authors judged ordinary moxa use unlikely to pose a health risk.1
- Dose: not applicable.
- Limitations: chemistry of the smoke, not health outcomes in people. Anyone with asthma should still treat it as smoke.
Mugwort Dosing Perspectives
Not medical advice. The doses below are educational. They show how different herbalists and traditions have approached mugwort so you can see where they agree and disagree. They are not a recommendation for you. Talk with your healthcare provider or a clinical herbalist before using mugwort beyond an occasional cup of tea. Every monograph in this library uses the same approach; the materia medica home page explains why the doses are presented this way.
| Source | Preparation | Dose, as stated | Route |
|---|---|---|---|
| Maud Grieve, A Modern Herbal (1931) | Infusion of the herb, made in a covered vessel | 1 oz herb to 1 pint boiling water; half-teaspoonful doses while warm for fever and colds; cold, in similar doses, three times daily as a tonic | Internal |
| Richard Hool (1918) | Infusion | Half-teacup doses for fever and colds | Internal |
| British Herbal Pharmacopoeia (1983) | Dried herb by infusion; liquid extract 1:1 in 25 percent alcohol | 0.5 to 2 g dried herb, or 0.5 to 2 ml liquid extract, three times daily | Internal |
| David Hoffmann, Medical Herbalism (2003) (affiliate link) | Infusion; tincture 1:5 in 25 percent alcohol | Infusion of 1 to 2 teaspoons dried herb per cup, steeped 10 to 15 minutes, three times daily; tincture 1 to 4 ml three times daily | Internal |
| Bensky, Chinese Herbal Medicine: Materia Medica, Ai Ye (A. argyi leaf) | Decoction; charred leaf for bleeding; decoction as an external wash; aged leaf as moxa | 3 to 9 g decocted | Internal; external |
| Ayurvedic sources, as reported by Ekiert et al. (2020) | Dried herb or liquid extract | 0.5 to 2 g per single dose | Internal |
| German folk practice, as reported by Ekiert et al. (2020) | Infusion | One teaspoon (about 1.2 g) dried herb per cup, covered, steeped about 5 minutes | Internal |
| German Commission E (1988) | Herb | No dose given. Unapproved monograph: traditional uses listed, effectiveness "not confirmed" | Not recommended |
The Western sources agree closely: about half a gram to two grams of dried herb per dose, or a few milliliters of tincture, taken up to three times a day. Grieve's half-teaspoon doses of a strong infusion sit at the low end, which fits her emphasis on the nervous system rather than the gut. Chinese practice runs higher, at 3 to 9 g decocted, because the leaf is one part of a multi-herb formula and the decoction is boiled rather than steeped. Commission E is the outlier in refusing to endorse any dose. The gap between the traditions is smaller than it looks once you account for the preparation: a 9 g decoction boiled for 20 minutes has lost much of its volatile oil, while a 2 g covered infusion has kept it.1,2,5,8,9,19
Mugwort Tea, Tincture, and Other Preparations
Not every constituent in a plant dissolves in every solvent, so the preparation decides what ends up in the cup. If the extraction methods are new to you, start with my article on decoctions versus infusions.
Solubility of the constituents
- Essential oil: dissolves in alcohol and fat, only partly in water, and leaves with steam. This is where the carminative and nervine actions live, and also where the thujone lives.
- Sesquiterpene lactones (the bitters): dissolve in alcohol and moderately in hot water. A tea tastes bitter because enough of them come through.
- Flavonoids and caffeoylquinic acids: dissolve well in hot water and in alcohol-water mixtures. The homeopathic tincture standard is set on these compounds.1
- Coumarins: dissolve in alcohol; partly in hot water.
- Tannins: dissolve in water, more with longer steeping.
Mugwort tea
Mugwort tea is a covered infusion of the dried leaf and flowering top. One teaspoon of dried herb per cup, boiling water, lid on, 10 minutes, then strain. The lid keeps the volatile oil in the cup, and the oil is a large part of what the tea is for. Traditionally the cup is taken before a meal as a bitter digestive, or in the evening for the nervine and dream uses, and Grieve's fever preparation is the same infusion made stronger and sipped warm.2,8
- What it tastes like. Bitter first, then a sage-like aromatic finish with a faint sweetness. Most people find it easier to drink than wormwood tea and harder than chamomile. Sweetening blunts the bitter action on digestion, since bitterness on the tongue is what triggers the response; a slice of lemon or a sprig of peppermint is the traditional way to soften it without sugar.
- How much and how often. The sources above land between one cup and three cups a day, with the dried-herb amount per cup between half a gram and two grams. Every source that gives a duration keeps it short: a course of days to two weeks, then a break.
- Who should not drink it. Anyone pregnant or trying to conceive, anyone with a daisy-family allergy, and anyone with a seizure disorder. The full list, including the thujone question, is in the Safety section below.
Mugwort tincture
A 1:5 tincture in 45 percent alcohol pulls the bitters, flavonoids, coumarins, and most of the oil together. Hoffmann's 25 percent also works but leaves more of the oil behind. Tincture is dosed in drops or single milliliters, three times a day in the Western sources, and is the form most herbalists use for the menstrual and digestive indications because the dose is easy to keep small and consistent. Napiers in Edinburgh, one of the oldest herbal dispensaries in Britain, sells a 1:3 at 45 percent.8,20 If you make your own, my article on making herbal tinctures covers ratios and alcohol strength.
Decoction, wash, and sitz bath
- Decoction, Chinese style. 3 to 9 g of leaf simmered with other herbs. The boil drives off oil but extracts the tannins and phenolic acids fully, which suits the hemostatic and warming uses in that tradition.5
- External wash or sitz bath. A strong decoction cooled to skin temperature, used for damp, itchy skin in Chinese practice and, as a warm sitz bath, for period pain and hemorrhoids in the European record.1,5,10 This is the preparation behind most "mugwort for skin" claims, along with the Korean cosmetic extracts; neither has a trial behind it, and the contact dermatitis caution in Safety applies.
Infused oil, liniment, and insect repellent
Dried leaf steeped in a carrier oil pulls the volatile oil and carries it into the skin. This is the form behind the Chumash liniment.14 The essential oil is also a traditional insect repellent and fumigant; Ekiert lists that as one of its few current commercial uses.1 For a comparison of plant-based repellents that have actually been tested, see my tick repellent article.
Moxa
Aged, fluffed leaf of A. argyi rolled into sticks or cones and burned near the skin. Heat is the medicine here. Moxibustion belongs with a trained practitioner, and for breech presentation with your maternity provider.5,17
Dream pillow
Dried leaf in a small cloth bag under the pillow. Aroma only. No thujone exposure to speak of, and the only preparation on this list with no safety notes attached.
Smoking mugwort
Mugwort has been smoked in Europe for centuries, alone or as a tobacco substitute, which is where the name sailor's tobacco comes from. Smoking does deliver the volatile oil quickly, and the traditional purposes were relaxation and dreams.1,21 It also delivers combustion products to the lungs, the same tars and aromatic amines measured in moxa smoke, and it concentrates whatever thujone the plant carries. The tea and the dream pillow reach the same traditional goals without the smoke. If you use a smoking blend, keep mugwort a minor ingredient, choose a low-thujone source, and treat it as an occasional use. My herbal smoking blend is formulated on that basis.
Preparations to skip
- Essential oil taken internally. Distillation concentrates the thujone by a factor of hundreds. This is the one form of mugwort that has caused documented harm in its relatives, and there is no tradition of drinking it.15
- Root as a bitter. Ekiert notes the root lacks the bitter compounds, so a root tea does nothing for digestion. The root was the old German epilepsy remedy, a use with no evidence behind it.1
- Glycerite. Glycerin holds the volatile oil poorly and extracts the bitters weakly. You get flavor without much medicine.
Mugwort Side Effects, Safety, and Cautions
Not medical advice. Herbs contain active compounds that can interact with medications and health conditions. Mugwort has a long record of use as a food seasoning and a bitter tea, and a much thinner safety record at medicinal doses. Germany's Commission E declined to approve it in 1988, and a 20th-century German assessment concluded its allergenic potential made it better suited to the kitchen than the medicine cabinet.1,19 The cautions below apply to anyone using it beyond an occasional cup. Talk with your healthcare provider or pharmacist first if any of them apply to you.
Francis Brinker's Herbal Contraindications and Drug Interactions grades each caution by its evidence: empirical (from human use or clinical observation) or speculative (from animal or test-tube data), with the study setting noted. His mugwort entry lists two contraindications and no drug interactions. His grades are carried through below.21
Side effects reported with mugwort
- Allergic reactions, from hay fever and contact dermatitis to a documented blistering rash after medicinal use, in people sensitized to the daisy family. Detailed below.21
- Digestive upset at high doses, the same nausea and cramping any strong bitter can cause when overdone. Traditional only; no case series.
- Uterine effects, the reason for the pregnancy contraindication.21
- Nervous system effects from thujone in high-thujone chemotypes at high sustained doses, or from the essential oil. No case has been documented for mugwort tea; the concern is inferred from wormwood and sage.15
Pregnancy: where the traditions disagree
- Western position. Mugwort is a classical emmenagogue, a herb that brings on menstruation, and European folk records include its use to induce labor or miscarriage. The British Herbal Pharmacopoeia and Hoffmann both contraindicate it in pregnancy.1,8,9 Brinker's first contraindication is "avoid pregnancy," graded empirical for the emmenagogue and abortifacient effects, with the uterine stimulant action shown in vitro or in animals and attributed to thujone.21 The rat study showing anti-implantation activity, described in the research section, points the same direction.1
- Chinese position. Ai Ye, the charred leaf of A. argyi, is used inside formulas for threatened miscarriage with cold-pattern spotting, under a trained practitioner and within a diagnosed pattern.5
- Moxibustion. External use over the little toe in the last weeks of pregnancy has been tested in more than 2,000 women without a safety signal in the trials, and always under maternity care.17
- What this means in practice. Do not take mugwort internally while pregnant or trying to conceive. The Chinese use is a practitioner-supervised exception with a different species and preparation, not a home remedy. Nursing has no safety data, so the same rule applies.
Allergy: the best-documented risk
- Brinker's contraindication. "Do not use if there is allergic hypersensitivity to the plant." He cites a human case report in which an erythema-multiforme-like eruption, a spreading rash with target-shaped blisters, developed after both external and internal medicinal use of mugwort, and a human case report plus a human clinical study showing cross-sensitivity with chamomile pollen.21
- Pollen. Mugwort pollen is one of the main causes of late-summer hay fever in Europe and northern China. Its major allergen, Art v 1, cross-reacts with ragweed and other daisy-family pollens.3,16
- Mugwort-celery-spice syndrome. A minority of people sensitized to mugwort pollen react to celery, carrot, fennel, anise, coriander, black pepper, paprika, and related foods. A 2024 study from Germany's Paul-Ehrlich-Institut identified the celery protein Api g 7 as the cross-reacting partner of Art v 1 and linked it to severe, sometimes life-threatening celery reactions.16 If you have mugwort hay fever and have ever reacted to celery or spices, treat mugwort preparations as a possible trigger.
- Contact dermatitis. Handling the fresh plant causes skin reactions in some people, a pattern seen across the Asteraceae.1
- Family allergy. Anyone with known allergy to ragweed, chamomile, echinacea, or other daisy-family plants should avoid mugwort. Brinker's chamomile evidence makes that family rule a documented one rather than a precaution.21
Thujone
Thujone is a nervous-system toxin found in wormwood, sage, and some mugwort. The sources disagree on how much mugwort carries. Brinker calls thujone its "major volatile constituent."21 Ekiert's review, which compared plants from nine countries, found the thujone share of the essential oil ranging from zero in German and Brazilian samples to over 20 percent in some Lithuanian, Indian, and Moroccan samples.1 Both can be right: it depends on where the plant grew. The European Medicines Agency's public statement on thujone-containing herbal medicines sets a daily ceiling of 6 mg per person for a maximum of 2 weeks.15 Three practical consequences follow. A cup of tea from dried leaf carries a small fraction of the plant's oil and, from a low-thujone source, little or no thujone. The distilled essential oil concentrates it and should never be taken by mouth. Long daily use at tincture doses is the gray zone, which is why every source that gives a duration keeps it short. See the sage monograph for the fuller thujone discussion.
Mugwort essential oil
The distilled oil is the plant's volatile fraction with everything else removed, so its thujone content is the chemotype's thujone content multiplied many times over. It has a place in insect repellents and, heavily diluted, in topical work by people trained to use it. It has no place in a cup, a capsule, or a diffuser in a room with a pregnant person, an infant, or anyone with epilepsy.15,21
Medications
Brinker lists no drug interactions for mugwort.21 The points below are theoretical and drawn from laboratory findings.
- MAO-inhibitor antidepressants and serotonin-active drugs, theoretical. Mugwort flavonoids and coumarins inhibited monoamine oxidase in mouse brain tissue in a dish.1 No human interaction has been reported, and tea concentrations are far below the test-tube levels. Worth a mention to your prescriber if you take an MAOI or a drug with a narrow margin, and low confidence either way.
- Hormone-sensitive conditions and hormonal medications, theoretical. The estrogen-receptor activity measured in yeast was about 5 percent of estradiol.1 Anyone with a hormone-sensitive cancer, or on hormonal therapy, should ask before using mugwort beyond food amounts.
- Blood thinners. No direct evidence either way. Chinese practice uses the charred leaf to stop bleeding, and the plant's coumarins are the plain type that do not thin blood. Culinary and tea use is not a concern; medicinal doses alongside warfarin are an unknown, and unknowns belong in a conversation with the prescriber.
- Nutrient absorption. The British Herbal Pharmacopoeia notes that high doses may interfere with nutrient absorption, without citing data.9
Constitutional cautions
- Heat from yin deficiency. Chinese sources contraindicate Ai Ye where heat signs come from depleted fluids, and caution in blood-heat bleeding.5
- Hot, dry, irritable constitutions. Western energetics point the same way. A person who runs hot, sleeps poorly from restlessness, and has a dry, inflamed gut is a poor match for a warming, drying bitter.
- Seizure disorders. Mugwort was a folk seizure remedy, and thujone is a known seizure trigger at high doses. Those two facts do not cancel out. Anyone with epilepsy should avoid mugwort at medicinal doses and avoid the essential oil entirely.4,15
Moxa and smoke
- Burns. The main adverse event in moxibustion trials is a minor skin burn from holding the stick too close.17
- Smoke. Chemical analysis found moxa smoke unlikely to pose a risk at normal exposure, but it is still smoke. Ventilate, and skip it with asthma or in a room with an infant.1 The same applies to smoking the leaf.
Children
No dosing data exist for children, and the allergy and thujone concerns apply with more force in small bodies. A dream pillow is fine. Internal use is not.
Sourcing and identification
Because chemotypes differ so much, buy dried mugwort from a supplier that names the species and country of origin. If you gather your own, confirm the white-felted leaf underside and the sage-like smell, and use the look-alike table in the identification section to rule out wormwood, which is far higher in thujone. Do not harvest from roadsides, where Artemisia concentrates road pollutants, and avoid the flowering tops during pollen season if you have hay fever. If you want to learn plant identification properly, the Become an Herbalist page lists the training paths.
Frequently Asked Questions About Mugwort
What is mugwort used for?
Traditionally, as a bitter for cold, sluggish digestion; as a warming herb for painful or delayed periods; as a mild nervine; and, in Chinese medicine, as the charred leaf that stops cold-type bleeding and the aged leaf that becomes moxa. Folk use adds vivid dreams. Human trials exist only for moxibustion, which supports a modest effect on turning breech babies and on period pain.
What is mugwort tea good for?
The traditional reasons for drinking it are digestive, taken before meals as a bitter, and nervine, taken in the evening. It is also the usual form for the dream tradition. No trial has tested mugwort tea for anything, so those are records of use rather than proven effects. See the tea section above for how it is made and who should skip it.
Is mugwort tea safe to drink?
For most non-pregnant adults without a daisy-family allergy, an occasional cup of covered infusion from a reputable source is within every traditional dose range on this page. The people who should skip it are anyone pregnant or trying to conceive, anyone with mugwort, chamomile, or ragweed allergy, and anyone with a seizure disorder. Daily use for weeks at a time is where the thujone question arises, so keep courses short.
What are the side effects of mugwort?
Allergic reactions are the documented ones: hay fever from the pollen, contact rash from the plant, and one reported case of a blistering eruption after medicinal use. High doses of any bitter can cause nausea. The uterine effect is why pregnancy is a contraindication, and thujone is a concern with high-thujone chemotypes, the essential oil, or long daily use.
Does mugwort make you infertile?
There is no human evidence that it does. In rats, a leaf extract prevented implantation and showed estrogen-like activity, and the plant has a long record as an emmenagogue. That is enough reason to avoid it while trying to conceive, and no reason to expect lasting effects on fertility once it is stopped. Anyone with concerns about fertility should raise them with their provider.
Can I take mugwort while pregnant?
No. Western sources contraindicate it as a uterine stimulant, Brinker grades that caution empirical, and animal work shows anti-implantation activity. Chinese medicine uses a charred preparation of a related species inside supervised formulas for threatened miscarriage, which is a practitioner decision, not a home remedy.
What does mugwort look like?
A tall, branching plant with deeply cut leaves that are dark green on top and white with felt underneath, purple-tinged stems, and spikes of small dull yellow-brown flowers in late summer. The white leaf underside is the field mark. The identification section above has the full description and a look-alike table.
What does mugwort taste and smell like?
The crushed leaf smells sharp and resinous, close to sage with a camphor note. The taste is bitter with a spicy, aromatic finish, milder than wormwood. Young spring leaves are the least bitter, which is why they are the stage eaten as a green in Japan and Korea.
Is mugwort the same as wormwood?
No. Both are Artemisia species, but wormwood (A. absinthium) is silver on both leaf surfaces, far more bitter, and carries much more thujone. Sweet wormwood (A. annua) is a third plant, the source of the malaria drug artemisinin. Mugwort contains little or no artemisinin.
What is the difference between mugwort and motherwort?
Only the name. Motherwort is a mint-family plant with a square stem and hand-shaped leaves; mugwort is a daisy-family plant with round stems and white-felted leaves. Their chemistry, traditional uses, and safety cautions are different.
What is Chinese mugwort? What is Japanese mugwort?
Chinese mugwort is Artemisia argyi, the source of Ai Ye and moxa. Japanese mugwort is Artemisia princeps, called yomogi, eaten as a spring green and used in Korean skincare. Both are close relatives of common mugwort with overlapping chemistry, and neither is the plant most Western sources describe.
Can you smoke mugwort?
People have for centuries, and it delivers the volatile oil quickly. It also delivers smoke to the lungs and concentrates any thujone the plant carries. The tea and the dream pillow reach the same traditional goals without those costs, so smoking is the least favorable route, and one to keep occasional if used at all.
Does mugwort cause vivid dreams?
That is the folk reputation across Europe and North America, and a 2024 review of dream-inducing substances lists mugwort with a plausible mechanism through monoamine oxidase inhibition. No trial has tested it. A dried-leaf pillow is the lowest-risk way to find out for yourself.
What is mugwort's spiritual meaning?
In European folklore it is a herb of protection and travel: St. John's girdle at midsummer, a leaf in the shoe against fatigue, a bundle over the door. Its Latin name honors Artemis, and Dioscorides tied it to the rites of Isis and Diana. The dream tradition belongs to the same history. These are cultural records, not claims about effects.
Is mugwort good for skin?
Chinese medicine uses a decoction of Ai Ye as a wash for damp, itchy skin, and Korean cosmetics use mugwort extracts for reactive skin. No trial supports either use, and mugwort is itself a common cause of contact dermatitis in the daisy-family allergic, so patch-test first and skip it entirely if you react to chamomile or ragweed.
Can mugwort cause a rash?
Yes, in sensitized people. Handling the fresh plant causes contact dermatitis in some, and Brinker cites a case in which medicinal use, both on the skin and by mouth, produced a blistering erythema-multiforme-like eruption. Anyone with a chamomile or ragweed allergy is at higher risk.
What is moxa?
Moxa is the dried, aged leaf of Chinese mugwort, Artemisia argyi, fluffed into wool and rolled into sticks or cones. Burned near the skin over acupuncture points, it delivers penetrating heat. Its best-studied use is encouraging a breech baby to turn, under maternity care.
Is mugwort a weed, and can I grow it?
It is classed as invasive across much of North America, spreading by root fragments that survive tilling and mowing. If you grow it, plant it in a large container or a bed with a root barrier, cut it before it sets seed, and check your state's noxious weed list first. In most regions you can gather it from the wild instead, away from roads.
Does mugwort grow in Montana?
Common mugwort, A. vulgaris, has naturalized in patches, but the Artemisia you will see everywhere here is western mugwort, A. ludoviciana, along with big sagebrush. Western mugwort has its own Indigenous medicinal record and is not a drop-in substitute for the European plant.
More herb monographs, built the same way, are in the free materia medica, and printable references are on the free resources page.
Sources
- Ekiert H, Pajor J, Klin P, Rzepiela A, Ślesak H, Szopa A. Significance of Artemisia vulgaris L. (common mugwort) in the history of medicine and its possible contemporary applications substantiated by phytochemical and pharmacological studies. Molecules. 2020;25(19):4415. DOI: 10.3390/molecules25194415. Open access; no conflicts declared. Source for botany, chemotype variation, historical use, the Commission E and pharmacopoeia status, and the laboratory studies summarized on this page.
- Grieve M. Mugwort. A Modern Herbal, 1931. Public domain, hosted at botanical.com.
- Cosi V, Gadermaier G. The role of defensins as pollen and food allergens. Current Allergy and Asthma Reports. 2023;23:277-285. DOI: 10.1007/s11882-023-01080-3. Review of Art v 1 and its cross-reactivity.
- Felter HW, Lloyd JU. Absinthium (U.S.P.), with notes on related Artemisia species including A. vulgaris and A. ludoviciana. King's American Dispensatory, 1898. Public domain, hosted at Henriette's Herbal.
- Bensky D, Clavey S, Stöger E. Chinese Herbal Medicine: Materia Medica, 3rd edition. Eastland Press, 2004. Artemisiae argyi Folium (ai ye) entry.
- Adams JD, Garcia C. Women's health among the Chumash. Evidence-Based Complementary and Alternative Medicine. 2006;3(1):125-131. PMC1375244. Ethnobotanical record; the senior author practices the tradition described.
- Trifan A, et al. Artemisia spp.: an update on its chemical composition, pharmacological and toxicological profiles. Oxidative Medicine and Cellular Longevity. 2022;2022:5628601. PMC9467740. Genus-level review; source for the species distinctions and the laboratory-only status of antiviral claims. .
- Hoffmann D. Medical Herbalism: The Science and Practice of Herbal Medicine. Healing Arts Press, 2003 (affiliate link). Mugwort entry.
- British Herbal Medicine Association. British Herbal Pharmacopoeia, 1983. Artemisia vulgaris entry.
- Tobyn G, Denham A, Whitelegg M. Artemisia vulgaris, mugwort. In: The Western Herbal Tradition: 2000 Years of Medicinal Plant Knowledge. Churchill Livingstone, 2011. Excerpt at ScienceDirect Topics. Source for the Hool and Stevens dosing and the Thomsonian sitz bath.
- King J. Artemisia absinthium, with the note on A. vulgaris. The American Eclectic Dispensatory, 1854. Public domain, hosted at Henriette's Herbal.
- Remington JP, Wood HC, eds. Absinthium, N.F. IV, with the note on A. vulgaris. The Dispensatory of the United States of America, 1918. Public domain, hosted at Henriette's Herbal.
- Oldoni AA, Bacchi AD, Mendes FR, Tiba PA, Mota-Rolim S. Neuropsychopharmacological induction of (lucid) dreams: a narrative review. Brain Sciences. 2024;14(5):426. DOI: 10.3390/brainsci14050426. Narrative review; no trials of mugwort identified.
- Adams JD, Garcia C. The advantages of traditional Chumash healing. Evidence-Based Complementary and Alternative Medicine. 2005;2(1):19-23. PMC1062165. Case reports without controls; the senior author practices the tradition described.
- European Medicines Agency, Committee on Herbal Medicinal Products. Public statement on the use of herbal medicinal products containing thujone, revision 1. EMA/HMPC/732886/2010 Rev.1, 2012. EMA thujone statement (PDF). .
- Paul-Ehrlich-Institut. New insights on celery allergies and associated risks. Press release, 22 May 2024, summarizing Ballmer-Weber BK, et al. New light on an old syndrome: role of Api g 7 in mugwort pollen related celery allergy. Journal of Allergy and Clinical Immunology. 2024;154:679-689. German federal institute; no industry funding.
- Coyle ME, Smith C, Peat B. Cephalic version by moxibustion for breech presentation. Cochrane Database of Systematic Reviews. 2023;(5):CD003928. DOI: 10.1002/14651858.CD003928.pub4. One review author was an investigator on an included pilot trial; assessed independently by the other two.
- Yang M, et al. Moxibustion for pain relief in patients with primary dysmenorrhea: a randomized controlled trial. PLOS ONE. 2017;12(2):e0170952. DOI: 10.1371/journal.pone.0170952. Drug-controlled, no placebo arm. .
- German Commission E. Mugwort (Artemisiae vulgaris herba), unapproved herb monograph, 1988. In: Blumenthal M, ed. The Complete German Commission E Monographs. American Botanical Council, 1998. ABC Commission E, Mugwort. ABC is a nonprofit funded in part by industry membership. .
- Napiers the Herbalists, Edinburgh. Mugwort tincture, Artemisia vulgaris, 1:3 in 45 percent. Retail product page; cited only for the tincture strength and the dispensary's stated adult dose. Commercial source, low confidence for anything beyond that.
- Brinker F. Herbal Contraindications and Drug Interactions, 4th edition. Eclectic Medical Publications, 2010. Mugwort entry, p. 248. Brinker grades each entry as empirical or speculative and notes the study setting (human, animal, in vitro); those grades are quoted as given. Also the source for the common names felon herb and sailor's tobacco.
This monograph is updated as new research and sources become available.
Ivy Ham
I'm Ivy Ham, a clinical herbalist dedicated to blending traditional healing wisdom with modern science, and revealing how nature's remedies can enhance everyday wellness. Through my blog, I share insights on herbal solutions, nutrition, and holistic practices to guide you toward a more balanced, vibrant life.
Certified clinical herbalist · Missoula, Montana · Read more about Ivy