Xia Yuxue Tang (Drain Static Blood Decoction) xià yū xuè tāng · 下瘀血汤

Safety. Three ingredients, and Jingui Yaolüe places the formula in the postpartum chapter: abdominal pain in a woman who has just given birth, with 干血 — dried, static blood — lodged below the navel. It is recorded as well for obstructed menstruation. What makes this formula worth writing about, more than its size, is what ultrasound did to its indication. 干血着脐下 is something the classical text inferred from pain, lochia and palpation. Today the postpartum abdomen with pain and unsatisfactory lochia gets scanned, and the single most important thing on that scan is retained products of conception — placental or membrane tissue left inside. That is a cause with a procedure attached to it, and it competes directly with endometritis, which is an infection with antibiotics attached to it. The two do not reliably feel different to the person, and separating them by symptoms alone is not dependable. So the honest mapping is not "干血 = retained tissue". It is this: the thing the classical text was pointing at is now directly visible, and it has a specific management that a blood-breaking formula does not provide. Postpartum pain itself has a list that has to be gone through rather than assumed: uterine involution, endometritis, retained products, perineal and wound infection, caesarean scar complications, ovarian torsion, appendicitis, bowel and urinary causes, and — never low on the list, because it is common and dangerous — pre-eclampsia and HELLP syndrome presenting after delivery rather than before it. Postpartum fever is endometritis until shown to be otherwise, and puerperal sepsis is the historical reason childbirth was one of the most dangerous events in a person's life. The safety side has a particular shape here, because this is the only formula in the batch whose indication is a physiological state rather than a disease. Pregnancy and the weeks after delivery are hypercoagulable: venous thromboembolism risk is elevated for roughly six weeks postpartum. A formula whose entire purpose is to break blood sits awkwardly against that background in both directions — bleeding on one side, thrombosis on the other. Rhubarb is an anthraquinone laxative, with potassium loss and melanosis coli on prolonged use; anthraquinones have been reported in breast milk in small amounts, and no safe level has been established for lactation. Peach kernel contains amygdalin. Ground beetle is an insect-derived substance with allergic potential and a fixed place in this corpus's pregnancy exclusions. Chinese clinical literature reports this formula for lochia retention and postpartum pain, mostly in small studies. The library records that research exists; it does not record that the effect has been established.