Nature’s Way Dong Quai Root 100 Capsules – Walmart.com – Walmart.com.Click to see full answer. Also know, how much is dong quai? Nature’s Way Dong Quai Root — 100 Capsules / 565 mg Was: $9.79 You Save: $1.04 (11%) is dong quai safe during pregnancy? DO NOT use dong quai during pregnancy. It may cause the uterus to contract and raise the risk of miscarriage. Nursing mothers should not take dong quai because no one knows if it is safe when you are breastfeeding. Keeping this in view, what is dong quai used for? Dong quai is used for menstrual cramps, premenstrual syndrome (PMS), and menopausal symptoms. It is also used orally as a “blood purifier”; to manage hypertension, infertility, joint pain, ulcers, “tired blood” (anemia), and constipation; and in the prevention and treatment of allergic attacks.How long can you take dong quai?The following doses have been studied in scientific research: BY MOUTH: For menopausal symptoms: 15 chewable tablets of a product containing dong quai and chamomile (Climex) have been taken daily for 12 weeks.