Herb | Reason to avoid |
Aloe Vera | The leaves are strongly purgative and should not be taken internally. |
Arbor vitae (Thuja occidentalis) | A uterine and menstrual stimulant that could damage the fetus. |
Autumn crocus (Colichicum autumnale) | Can affect cell division and lead to birth defects. |
Barberry (Berberis vulgaris) | Contains high levels of berberine, known to stimulate uterine contractions. |
Basil oil | A uterine stimulant; use only during labor. |
Beth root (Trillium erectum) | A uterine stimulant; use only during labor. |
Black cohosh (Cimicifuga racemosus) | May lead to premature contractions; avoid unless under professional guidance. Safe to use during childbirth. |
Bloodroot (Sanguinaria canadensis) | A uterine stimulant that in quite small doses also causes vomiting. |
Blue cohosh (Caulophyllum thalictroides) | A uterine stimulant to avoid unless under professional guidance. Safe to use during childbirth. |
Broom (Cytisus scoparius) | Causes uterine contractions so should be avoided during pregnancy; in parts of Europe it is given after the birth to prevent blood loss. |
Bugleweed (Lycopus virginicus) | Interferes with hormone production in the pituitary gland, so best avoided. |
Clove oil | A uterine stimulant used only during labor. |
Comfrey (Symphytum officinale) | Contains toxic chemicals that will cross the placenta; do not take internally. |
Cotton root (Gossypium herbaceum) | Uterine stimulant traditionally given to encourage contractions during a difficult labor, but rarely used medicinally today. |
Devil’s claw (Harpagophytum procumbens) | Uterine stimulant, oxytocic. |
Dong quai (Angelica polymorpha var. sinensis) | Uterine and menstrual stimulant, best avoided during pregnancy; ideal after childbirth. |
False unicorn root (Chamaelirium luteum) | A hormonal stimulant to avoid unless under professional guidance. |
Feverfew (Tanacetum parthenium) | Uterine stimulant; may cause premature contractions. |
Golden seal (Hydrastis canadensis) | Uterine stimulant; may lead to premature contractions but safe during childbirth. |
Greater celandine (Chelidonium majus) | Uterine stimulant; may cause premature contractions. |
Juniper and juniper oil (Juniperus communis) | A uterine stimulant; use only during labor. |
Lady’s mantle (Alchemilla xanthoclora) | A uterine stimulant; use only in labor. |
Liferoot (Senecio aureus) | A uterine stimulant containing toxic chemicals that will cross the placenta. |
Mistletoe (Viscum album) | A uterine stimulant containing toxic chemicals that may cross the placenta. |
Mugwort (Artemesia vulgaris) | A uterine stimulant that may also cause birth defects; avoid unless under professional guidance. Also avoid when breastfeeding. |
American pennyroyal (Hedeoma pulegioides) | Reputed uterine stimulant to be avoided during pregnancy. |
European pennyroyal (Mentha pulegium) | A uterine stimulant that may also cause birth defects; avoid unless under professional guidance. Also avoid when breastfeeding. |
Peruvian bark (Cinchona officinalis) | Toxic; excess may cause blindness and coma. Used to treat malaria and given during pregnancy only to malaria sufferers under professional guidance. |
Pokeroot (Phytolacca decandra) | May cause birth defects. |
Pseudoginseng (Panax notoginseng) | May cause birth defects. |
Pulsatilla (Anemone pulsatilla) | Menstrual stimulant best avoided during pregnancy; limited use during lactation. |
Rue (Ruta graveolens) | Uterine and menstrual stimulant; may cause premature contractions. |
Sassafras (Sassafras albidum) | A uterine stimulant that may also cause birth defects. |
Shepherd’s purse (Capsella bursa-pastoris) | A uterine stimulant; use only during labor. |
Southernwood (Artemisia abrotanum) | A uterine stimulant that may also cause birth defects; avoid unless under professional guidance. Also avoid when breastfeeding. |
Squill (Urginea maritima) | A uterine stimulant that may also cause birth defects. |
Tansy (Tanacetum vulgare) | A uterine stimulant that may also cause birth defects. |
Wild yam (Diascorea villosa) | A uterine stimulant to avoid unless under professional guidance; safe during labor. |
Wormwood (Artemisia absinthum) | A uterine stimulant that may also cause birth defects; avoid unless under professional guidance. Also avoid when breastfeeding. |
Herbs to use only in moderation during pregnancy:
Herb | Reason for caution |
Alder buckthorn (Rhamnus frangula) | Strongly purgative, so should not be taken in high doses or for long periods. |
Angelica (Angelica archangelica) | A uterine stimulant in high doses, but quite safe as a culinary herb. |
Anise and aniseed oil (Pimpinella anisum) | A uterine stimulant in high doses, but quite safe as a culinary herb; avoid using the oil entirely. |
Bitter orange (Citrus aurantiam) | A uterine stimulant in high doses, but quite safe as a culinary herb or in moderate use. |
Caraway (Carum carvi) | A uterine stimulant in high doses, but quite safe as a culinary herb. |
Cascara sagrada (Rhamnus purshiana) | Strongly purgative, so should not be taken in high doses or for long periods. |
Celery seed and oil (Apium graveolens) | A uterine stimulant in high doses, but quite safe as a culinary herb. |
Chamomile oil | The oil is a potent uterine stimulant to be avoided, but the dried or fresh herb is safe in moderation. |
Chili (Capsicum spp) | Avoid high doses as they may lead to heartburn; can flavor breast milk when breast-feeding. Moderate culinary use is fine. |
Cinnamon (Cinnamomum zeylanicum) | A uterine stimulant in high doses, but quite safe as a culinary herb; avoid the essential oil completely. |
Cowslip (Primula veris) | Strongly purgative and a uterine stimulant in high doses. |
Elder bark | Strongly purgative, so should not be taken in high doses or for long periods. |
Fennel and fennel oil | A uterine stimulant in high doses, but quite safe as a culinary herb; avoid using the oil entirely. |
Fenugreek (Trigonella foenum-graecum) | A uterine stimulant in high doses, but quite safe as a culinary herb or during labor. |
Garlic (Allium sativa) | Avoid high doses as they may lead to heartburn; can flavor breast milk when breastfeeding. Moderate culinary use is fine. |
Gotu kola (Centella asiatica) | Possible uterine stimulant; use in moderation for occasional teas only. |
Jasmine oil | A uterine stimulant best reserved for childbirth to ease labor. |
Korean ginseng (Panax ginseng) | Clinical reports suggest that high doses in pregnancy can lead to androgynous babies (caused by overstimulation of male sex hormones); use for short periods only. |
Lavender (Lavendula argustifolia) | A uterine stimulant in high doses, but quite safe as a culinary herb or for moderate use. |
Licorice (Glycyrrhiza glabra) | High doses can exacerbate high blood pressure; safe in moderation. |
Lovage (Levisticum officinale) | A uterine stimulant traditionally used in slow and difficult labor; safe as a culinary herb. |
Marjoram and marjoram oil (Origanum vulgare) | A uterine stimulant in high doses, but quite safe as a culinary herb; avoid using the oil entirely. |
Motherwort (Leonurus cardiaca) | A uterine stimulant in high doses; best limited to the final weeks and during labor. |
Myrrh (Commiphora molmol) | A uterine stimulant that may lead to premature contractions; avoid high doses. |
Nutmeg and Nutmeg Oil | Inhibits prostaglandin production and contains hallucinogens that may affect the fetus; once erroneously regarded as an abortifacient. Safe in normal culinary use. |
Oregano (Origanum X marjoricum; O. onites) | A uterine stimulant in high doses, but quite safe as a culinary herb; avoid using the oil entirely. |
Parsley (Petroselinum crispum) | Uterine stimulant that may also irritate the fetus in high doses; safe in normal culinary use. |
Passion flower (Passiflora incarnata) | A uterine stimulant in high doses; safe for moderate use. |
Peppermint oil | A uterine stimulant; avoid the oil entirely, although low doses of the dried herb can be used. |
Raspberry leaf (Rubus idaeus) | A uterine stimulant in high doses; best limited to the final six to eight weeks and during labor. |
Rhubarb root (Rheum palmatum) | Strongly purgative, so should not be taken in high doses or for long periods. |
Rosemary and rosemary oil | A uterine stimulant in high doses; safe in moderation and normal culinary use. Avoid using the oil entirely. |
Saffron (Crocus sativa) | A uterine stimulant in high doses; safe in normal culinary use. |
Sage and sage oil | A uterine and hormonal stimulant in high doses, but quite safe as a culinary herb; avoid using the oil entirely. |
Senna (Senna alexandrina) | Strongly purgative, so should not be taken in high doses or for long periods. |
Tea, black (Camellia sinensis) | Limit to two cups a day, as excess can lead to palpitations and increased heart rate. |
Thyme oil (Thymus vulgaris) | Some reports claim that it acts as a uterine stimulant, though the research is disputed; the herb is quite safe in cooking. |
Vervain (Verbene officinalis) | A uterine stimulant in high doses; best limited to the final weeks and during labor. |
White horehound (Marrubium vulgare) | Reputed uterine stimulant; safe in moderation in cough drops. |
Wood betony (Stachys officinalis) | A uterine stimulant in high doses; best limited to the final weeks and during labor. |
Yarrow (Achillea millefolium) | A uterine stimulant in high doses; best limited to the final weeks and during labor. |
For more information on specific programs to address your blood pressure, contact Dan Prater, ND on 219.613.1161 or via email.
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