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Dong quai

Also listed as: Angelica sinensis; Chinese angelica; Danggui; Tan kue bai zhi; Tang kuei

Overview
Plant Description
Medicinal Uses and Indications
Dosage and Administration
 
Precautions
Interactions and Depletions
Supporting Research

Overview

Dong quai (Angelica sinensis) root has been used for more than a thousand years as a spice, tonic, and medicine in China, Korea, and Japan. It is still used often in Traditional Chinese Medicine (TCM), where it is usually combined with other herbs. In TCM it is used most often to treat women's reproductive problems, such as dysmenorrhea or painful menstruation, and to improve circulation. Dong quai is sometimes called the "female ginseng." Although there are few scientific studies on dong quai, it is sometimes suggested to relieve cramps, irregular menstrual cycles, infrequent periods, premenstrual syndrome (PMS), and menopausal symptoms.

Plant Description

Dong quai grows at high altitudes in the cold, damp, mountains of China, Korea, and Japan. This fragrant, perennial plant -- a member of the celery family -- has smooth purplish stems and bears umbrella-shaped clusters of white flowers and winged fruits in July and August. The yellowish-brown thick-branched roots of the dong quai plant have several medicinal uses. It takes 3 years for the plant to reach maturity. The root is harvested and made into tablets, powders, and other medicinal forms.

Medicinal Uses and Indications

Very few studies have been done looking at the use of dong quai in humans. Some lab tests suggest that dong quai contains compounds that may help reduce pain, dilate blood vessels, and stimulate and relax the muscles of the uterus. More studies are needed to see whether dong quai is safe or effective.

Treatment

Dong quai is sometimes suggested for the following conditions:

Menopausal symptoms

Some women report relief of symptoms such as hot flashes when taking dong quai. Researchers aren't sure whether dong quai has estrogen-like effects or if it blocks estrogens in the body, and the studies so far have been conflicting. One study found that dong quai did not help to relieve menopausal symptoms.

Other

Dong quai has also been suggested for these conditions, although there isn’t good scientific evidence:

  • Amenorrhea (absence of menstruation)
  • Heart disease -- One study suggested that a combination of dong quai, Asian ginseng (Panax ginseng), and astragalus (Astragalus membranaceus) decreased symptoms of chest pain in a small group of people with heart disease.
  • High blood pressure
  • Premature ejaculation -- as one ingredient in a cream applied topically

Dosage and Administration

Dong quai is available in a variety of forms, including tablets and powders. Injections are used in China and Japan in hospital or health center settings. You should not use injections at home.

Dong quai should be stored in a cool, dry place.

Pediatric

You should not give dong quai to a child.

Adult

There is no evidence to show what a safe dose is for humans, so it’s impossible to say what a recommended dose might be.

Dried herb (raw root) may be boiled or soaked in wine before consuming.

Powdered herb (available in capsules). In one study for menopausal symptoms, 500 - 600 mg tablets or capsules were taken up to six times daily.

Tincture (1:5 w/v, 70% alcohol): 40 - 80 drops (equivalent to 2 - 4 mL, there are 5 mL in a teaspoon), three times daily.

Precautions

You should not drink the essential oil of dong quai because it contains a small amount of cancer-causing substances.

People who have chronic diarrhea or abdominal bloating should not use dong quai.

People who are at risk of hormone-related cancers, including breast, ovarian, and uterine cancers, should not take dong quai because researchers aren’t sure if it acts like estrogen in the body.

Side Effects

Dong quai, particularly at high doses, may increase your sensitivity to sunlight and cause skin inflammation and rashes. Stay out of the sun or use sunscreen while taking dong quai.

Pregnancy and Breastfeeding

Dong not use dong quai during pregnancy. It may cause the uterus to contract and raise the risk of miscarriage. Nursing mothers should avoid dong quai because no one knows if it is safe when you are breastfeeding.

Pediatric Use

Do not give dong quai to a child because no one knows whether it is safe for children.

Interactions and Depletions

Dong quai may interact with the following medications and herbs:

Anticoagulants (blood-thinners) -- Dong quai may make the effects of these drugs, including warfarin (Coumadin), stronger, and raise the risk of bleeding. The same is true of using dong quai with the herbs listed below. Talk to your doctor before taking dong quai with any of the following:

  • Feverfew (Tanacetum parthenium)
  • Garlic (Allium sativum)
  • Ginger (Zingiber officinale)
  • Ginkgo (Ginkgo biloba)
  • Ginseng (Panax ginseng)
  • Licorice (Glycyrrhiza glabra)
  • Chinese skullcap (Scutellaria baicalensis)
  • Turmeric (Curcuma longa)

Hormone medications -- There is little research on using dong quai with hormone medications, such as estrogens, progesterones, oral contraceptives, tamoxifen, or raloxifene (Evista). But, because dong quai may have estrogen-like effects, you should not take it with hormone medications except under your doctor's supervision.

St. John's wort -- Both dong quai and St. John's wort can increase your sensitivity to sunlight. Talk to your doctor before taking them together.

Supporting Research

Al-Bareeq RJ, Ray AA, Nott L, Pautler SE, Razvi H. Dong Quai (angelica sinensis) in the treatment of hot flashes for men on androgen deprivation therapy: results of a randomized double-blind placebo controlled trial. Can Urol Assoc J. 2010 Feb;4(1):49-53.

Carroll DG. Nonhormonal therapies for hot flashes in menopause. Am Fam Physician. 2006;73(3):457-64.

Cho CH, Mei QB, Shang P, et al. Study of the gastrointestinal protective effects of polysaccharides from Angelica sinensis in rats. Planta Med. 2000;66(4):348-351.

Choi HK, Jung GW, Moon KH, et al. Clinical study of SS-Cream in patients with lifelong premature ejaculation. Urology. 2000;55:257-61.

Circosta C, Pasquale RD, Palumbo DR, Samperi S, Occhiuto F. Estrogenic activity of standardized extract of Angelica sinensis. Phytother Res. 2006;20(8):665-9.

Fugh-Berman A. Herb-drug interactions. Lancet. 2000; 355(9198):134-138.

Hardy ML. Herbs of special interest to women. J Am Pharm Assoc. 2000;40(2):234-242.

Kan WL, Cho CH, Rudd JA, Lin G. Study of the anti-proliferative effects and synergy of phthalides from Angelica sinensis on colon cancer cells. J Ethnopharmacol. 2008 Oct 30;120(1):36-43.

LaValle JB, Krinsky DL, Hawkins EB, et al. Natural Therapeutics Pocket Guide. Hudson, OH:LexiComp; 2000: 425-426.

Smolinske A. Dietary supplement-drug interactions. J Am Med Womens Assoc. 1999;54(4):191-196.

Williamson JS, Wyandt CM. An herbal update. Drug Topics. 1998;142(6):66-75.

Wojcikowski K, Wohlmuth H, Johnson DW, Rolfe M, Gobe G. An in vitro investigation of herbs traditionally used for kidney and urinary system disorders: Potential therapeutic and toxic effects. Nephrology (Carlton). 2008 Sep 22. [Epub ahead of print]

Wong VK, Yu L, Cho CH. Protective effect of polysaccharides from Angelica sinensis on ulcerative colitis in rats. Inflammopharmacology. 2008 Aug;16(4):162-7.

Yang T, Jia M, Meng J, Wu H, Mei Q. Immunomodulatory activity of polysaccharide isolated from Angelica sinensis. Int J Biol Macromol. 2006;39(4-5):179-184.

Yim TK, Wu WK, Pak WF, Mak DH, Liang SM, Ko KM. Myocardial protection against ischaemia-reperfusion injury by a Polygonum multiflorum extract supplemented 'Dang-Gui decoction for enriching blood', a compound formulation, ex vivo. Phytother Res. 2000;14(3):195-199.


Review Date: 10/12/2010
Reviewed By: Steven D. Ehrlich, NMD, Solutions Acupuncture, a private practice specializing in complementary and alternative medicine, Phoenix, AZ. Review provided by VeriMed Healthcare Network.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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