Dong quai has been used for centuries as a component of traditional Chinese medicine (TCM). According to the University of Maryland Medical Center (UMMC), TCM practitioners recommend dong quai as a treatment for infertility, heart disease, menstrual problems and menopause-related discomforts. There is little scientific evidence to support any of the uses traditionally associated with dong quai, and it may cause serious side effects and drug interactions. Consult a health care provider who is knowledgeable about botanical medicine before using dong quai or any other medicinal herb.
Skin Reactions
The UMMC warns that dong quai can increase a person's risk of sunburn, particularly when it is used in very high doses. Dong quai may also cause skin rashes and inflammation.
Anticoagulant Effect
According to MedlinePlus, dong quai may be a mild anticoagulant; it can prevent the blood from clotting normally. MedlinePlus advises caution for people with bleeding disorders; dong quai could also increase the risk of side effects from blood thinners like warfarin. Discontinue using dong quai before surgery or dental work.
Miscarriage
While dong quai is frequently recommended as a treatment for infertility, UMMC cautions against its use during any stage of pregnancy. Dong quai may trigger uterine contractions, leading to miscarriage or preterm birth.
Estrogenic Effects
According to MedlinePlus, there is little evidence that dong quai affects female hormones like estrogen and progesterone. However, in theory, this herb may increase estrogen levels in the human body. This could theoretically stimulate the growth of hormone-sensitive cancers in the breasts, uterus or ovaries. Additionally, dong quai may interfere with hormone-affecting drugs like oral contraceptives and hormone replacement therapy.
Laxative Effect
MedlinePlus notes that dong quai has traditionally been associated with gastrointestinal side effects. Dong quai is a mild laxative; it may cause loose stools, cramping and bloating. In large doses, this could lead to more significant complications like dehydration, vomiting and significant appetite loss.
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