Pharmaceutical Latin: Radix Achyranthis Bidentatae
Common English: Achyranthes Root
White Oxknee Root
Herbs that Regulate the Blood: Herbs that Invigorate the Blood
Taste Temperature Entering Meridians Dosage
Tincture: 2-4ml
Actions Indications/Syndromes

Invigorates the Blood and expels Blood Stasis

Blood Stasis with dysmenorrhea, amenorrhea and retained lochia

Pain due to trauma

Nourishes Liver and Kidney Yin, strengthens the sinews and bones and benefits the joints

Low back and knee pain and soreness due to Kidney and Liver Deficiency

Descends Blood and Fire

Blood Heat in the Upper Jiao with epistaxis, hematemesis and bleeding gums

Yin Deficiency with Empty Fire Rising with toothaches

Liver Yang Rising or Liver Fire with dizziness, headache and blurred vision

Clears Damp-Heat in the Lower Jiao

Damp-Heat Pouring Downward with knee pain, or lower back painful obstruction

As an auxiliary for painful urinary dysfunction (Lin) or vaginal discharge, especially for Stone Lin with lower back pain and bloody urine

  • Contraindicated during pregnancy.
  • Contraindicated in those with diarrhea due to Spleen Deficiency.
  • Contraindicated in those with weak Yuan Qi with menorrhagia or spermatorrhea.
  • Do not use with Rx. et Rz. Cynanchi Bai Qian.

Flos Carthami
Hong Hua
Rx. Angelicae Sinensis
Dang Gui
Cx. Cinnamomi
Rou Gui

Ru Xiang
Mo Yao
(Flos Carthami)
(Hong Hua)

Cx. Eucommiae
Du Zhong

Blood Stasis with late menstruation, dysmenorrhea or amenorrhea.

Pain due to trauma.

Low back and extremity pain and weakness due to Bi pain or Kidney Deficiency.

Rx. Rehmanniae Preparata
Shu Di Huang
Plastrum Testudinis
Gui Ban


Rx. Rehmanniae Preparata
Shu Di Huang
Plastrum Testudinis
Gui Ban
Cx. Eucommiae
Du Zhong
Hb. Cynomorii
Suo Yang

Fr. Chaenomelis
Mu Gua
Rz. Dioscoreae Hypoglaucae
Bei Xie
Rx. Stephaniae Tetrandrae
(Han Fang Ji)

Gypsum Fibrosum
Shi Gao
Rx. Rehmanniae Preparata
Shu Di Huang
(Rz. Anemarrhenae)
(Zhi Mu)


Weak lower back and extremities due to Liver and Kidney Deficiency.

Lower extremity pain due to Wind-Dampness Invasion.

Tooth, gum, and tongue swelling and pain.

Rx. Rehmanniae
Sheng Di Huang
Dai Zhe Shi

Dai Zhe Shi
Concha Ostreae
Mu Li
(Plastrum Testudinis)
(Gui Ban)

Ram. cum Uncis Uncariae
Gou Teng
Hb. Taxilli
Sang Ji Sheng

Yin Deficiency with Heat signs causing pain and swelling of the gums.

Dizziness and vertigo from Liver Yang Rising due to Liver and Kidney Yin Deficiency.

Liver Yang Rising with blurred vision, headache, and dizziness.

Rx. Angelicae Sinensis
Dang Gui
Plastrum Testudinis
Gui Ban
(Rz. Chuanxiong)
(Chuan Xiong)

Hb. Lysimachiae
Jin Qian Cao

Rx. Angelicae Sinensis
Dang Gui
Rx. Scutellariae
Huang Qin

Difficult labor.

Stone Lin with hematuria and low back pain.

Hot, painful urinary dysfunction.

Rx. Phellodendri
Huang Bai
Rz. Atractylodis
Cang Zhu


Rx. Phellodendri
Huang Bai
Sm. Coicis
Yi Yi Ren

Rx. Rehmanniae
Sheng Di Huang

Flos Carthami
Hong Hua
Rx. Angelicae Sinensis
Dang Gui
Sm. Persicae
Tao Ren

Red, swollen and painful joints of the lower extremities from Damp-Heat Pouring Downward.

Powerfully clears Deficiency Fire Blazing Upward with pain and swelling of the gums, epistaxis, hematemesis and other hemorrhage in the upper body.


Menstrual pain, irregular menstruation and postpartum pain.

Rx. Angelicae Sinensis
Dang Gui
Hb. Dianthi
Qu Mai
Hua Shi

Hb. Cirsii
Xiao Ji
Rz. Imperatae
Bai Mao Gen
Fr. Gardeniae
Zhi Zi


Blood Lin. (hot, painful urinary dysfunction)

Hematemesis and epistaxis.


  1. This herb directs the effects of the formula to the lower body.
  2. One source considers this herb to be a Yin Tonic.
  3. Some sources say that this herb helps clear pus and regulates water metabolism.
  4. In prepared form, this herb breaks up Blood Stasis, unblocks menstruation and guides Blood downward to treat amenorrhea, mobile and fixed abdominal masses, postpartum abdominal pain due to Blood Stasis, difficult labor, retained placenta, swelling and pain from external injury and joint pain due to Bi Syndrome.
  5. In its prepared form, it tonifies the Liver and Kidneys, strengthens sinews and bones and is used for aching weakness of the lower back and knees and lack of strength in the sinews and bones.
  6. Both Niu Xi and Rz. Curcumae Longae Jiang Huang break up Blood Stasis, drive Blood downward, unblock  menstruation, stop pain and affect the sinews. Niu Xi strengthens tendons and bones by tonifying the Liver and Kidneys which Jiang Huang does not do. Jiang Huang more powerfully breaks up Blood Stasis, promotes the movement of Qi, and affects the sinews by expelling Wind Bi.
  7. Dry-fried Achyranthes Chao Niu Xi has its slippery, downward-draining properties eliminated and has an enhanced ability to tonify the Liver and Kidneys.
  8. Salt-fried Achyranthes Yan Chao Niu Xi goes directly into the Kidney channel to tonify the Kidneys and nourish the sinews and bones. It is used for lower back ache and leg atrophy due to Kidney Deficiency and exhaustion of Jing.
  9. Wine-fried Achyranthes Jiu Niu Xi more strongly invigorates the Blood, unblocks the collaterals, stops pain and unblocks menstruation. It is used to treat mobile and fixed abdominal masses, difficult labor and retained placenta.
  10. Charred Achyranthes Niu Xi Tan is used to treat Deficiency Fire blazing upward with bleeding gums, nosebleed and toothache.
  11. Rx. Achyranthis Longifoliae (Aspera) Yu Niu Xi is bitter, sour, neutral, invigorates Blood, dispels Blood Stasis, clears Heat, eliminates toxins and promotes urination. It treats amenorrhea, arthritis, throat swelling and pain, diphtheria, edema of the lower extremities, hematuria and trauma-related pain. The dosage is 10-15g.