Angelica sinensis, more commonly known as dong quai, is part of traditional Asian healing systems. Its primary use is for treating conditions involving women's reproductive systems, as explained by the University of Maryland Medical Center (UMMC). These problems include painful menstruation and cramps (dysmenorrhea), irregular menstrual cycles, infrequent periods and premenstrual syndrome. Dong quai root also may be useful for treating unpleasant symptoms of menopause, such as hot flashes. Several side effects are associated with dong quai use.
Photosensitivity
Dong quai can increase sensitivity to sunlight (photosensitivity) and cause skin inflammation, sunburn and rashes. This is particularly true with high doses. People taking dong quai root should avoid sun exposure, wear protective clothing and use sunscreen. Anyone taking medications that cause photosensitivity may not be able to use dong quai. These medications include tretinoin, certain types of antibiotics, antidepressants, anti-psychotic medications and drugs to treat cancer.
Increased Bleeding
Some components of dong quai have anticoagulant and anti-platelet effects and thus may increase bleeding, according to the National Institutes of Health (NIH). Anyone with a bleeding disorder or taking medications or herbs that increase the risk of bleeding should be cautious about using dong quai. Patients also should stop taking dong quai before any surgical or dental procedures.
Gastrointestinal Effects
Some people may experience gastrointestinal side effects when taking dong quai, according to the NIH--particularly if using the herbal remedy for a long period. Dong quai root usage can lead to diarrhea, lack of appetite, burping, bloating, upset stomach, nausea and vomiting.
Hormonal Effects
The UMMC advises people with hormone-related disorders or at increased risk for these conditions to not take dong quai, because the herb may have estrogen-like effects. These diseases include breast, ovarian, uterine and prostate cancers, as well as endometriosis. People also shouldn't take dong quai in combination other hormonal medications such as birth control pills without consulting a physician. Additionally, dong quai contains a small amount of an essential oil that may be carcinogenic, so people should only use the herb on a short-term basis and not exceed the recommended dose.
Allergic Reactions
Although unlikely, some people may experience an allergic reaction to dong quai root. Anyone who is hypersensitive or allergic to plants related to dong quai shouldn't use this herbal remedy, the NIH says. These plants include Angelica radix and those in the Apiaceae (Umbelliferae) family, such as anise, caraway, carrot, celery, coriander, dill, parsley and parsnips.
Possible Pregnancy Complications
Dong quai is a menstrual stimulant and may cause the uterus to contract. The UMMC warns that pregnant women should not take dong quai because it increases the risk of miscarriage.
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