Pinyin: Cang Zhu  Chinese: 蒼朮
Pharmaceutical: Rhizoma Atractylodes
Taxonomy: Atractylodes lancea seu chinensis seu japonica
English: Black Atractylodes / Gray Atractylodes / Sword-like Atractylodes root

Tastes: Pungent, bitter, warm
Meridians Entered: Spleen, Lung and Liver

Actions & Indications:

1. Strongly dries Dampness and tonifies the Spleen
   Dampness Obstructing the Middle Jiao and blocking transformative and transportive functions of the Spleen with anorexia, diarrhoea, epigastric distention and pressure, fatigue, nausea and vomiting and a thick, greasy tongue coat
2. Induces sweating and expels Wind-Dampness
   Wind-Cold Dampness and Wind-Dampness with chills and fever, headache, body aches and nasal congestion
   Painful extremities due to Wind-Damp Bi
3. Clears Dampness from the Lower Jiao
   Damp-Heat Pouring Downward with Leg Qi, some forms of atrophy disorders, vaginal discharge, swollen, sore joints
4. Improves vision
   Night blindness and diminished vision with a rough sensation in the eyes
5. Repels Ghosts
   "Strange diseases 奇病" that involve seeing ghosts
6. Aids fasting
   Mentioned in the Shen Nong Ben Cao Jing as part of the superior class of herbs which can, with protracted taking, make the body light, prolong life and make one free from hunger. This may suggest it was part of supplementing the diet when engaging in an "avoiding grain" (Bigu 辟穀) fasting regime to cultivate life (Yangsheng 養生).

Standard Dosage: 5-10g in decoction.

Pinyin: Huang Bai  Chinese: 黄柏
Pharmaceutical: Cortex Phellodendri
Taxonomy: Phellodendron amurense seu chinense
English: Amur Corktree Bark

Tastes: Bitter, cold
Meridians Entered: Liver, Gallbladder, Large Intestine, Kidney and Bladder

Actions & Indications:

1. Drains Damp-Heat especially from the Lower Jiao
   Thick, yellow vaginal discharge, foul smelling diarrhoea or dysenteric disorder
   Damp-Heat in the Lower Jiao
   Hot Leg Qi with red, swollen, painful knees, legs or feet
   Damp-Heat jaundice
2. Drains Kidney Fire (False Heat, Deficiency Heat)
   Kidney Yin Deficiency with Empty Fire Rising (steaming bone disorder, night sweats, afternoon fevers and sweating, occasionally with nocturnal emissions and spermatorrhea)
3. Drains Fire and relieves Fire toxicity
   Toxic sores and Damp-skin lesions (internally and topically)

Standard Dosage: 6-10g in decoction.
Cautions: It is contraindicated for deficiency-cold syndrome. Overdosage and long-time taking will impair spleen and stomach.

Pinyin: Chuan Niu Xi  Chinese: 川牛膝
Pharmaceutical: Radix Cyathulae
Taxonomy: Cyathula officinalis
English: Hookweed Root / Cyathula Root

Tastes: Sweet, slightly bitter, neutral
Meridians Entered: Liver and Kidney

Actions & Indications:

1. Invigorates the Blood, dispels Blood Stasis and unblocks the menses
   Blood Stasis leading to dysmenorrhea or amenorrhea
   Pain due to traumatic injury
2. Expels Wind and drains Dampness
   Wind-Damp Bi pain (especially in the lower back) and atrophy and spasm of the lower extremities
3. Promotes urination and treats dysuria
   Painful urinary dysfunction
4. Descends Blood and Fire
   Abnormal bleeding due to Fire Flaring Upwards with hematemesis, epistaxis, toothache ulceration of the mouth and tongue, dizziness and headache
5. Tonifies the Kidneys and Liver and strengthens the tendons and bones
   Lower back and knee soreness, weakness and pain

Standard Dosage: 6-10g in decoction.
Cautions: It is contraindicated for menorrhagia, pregnancy and spermatorrhea.

Pinyin: Dang Gui  Chinese: 當歸
Pharmaceutical: Radix Angelicae sinensis
Taxonomy: Angelica sinensis
English: Chinese Angelica Root / Tang-Kuei / Dong Quai Root

Tastes: Sweet, Pungent, Warm
Meridians Entered: Heart and Liver

Actions & Indications:

1. Tonifies the Blood and regulates the menses
   Blood Deficiency, especially when affecting the Heart and Liver with pale, ashen complexion, lusterless nails, tinnitus, blurred vision and palpitations
   Blood Deficiency associated irregular menstruation, amenorrhea and dysmenorrhea
2. Invigorates and harmonizes the Blood and disperses Cold (stops pain due to Blood Stasis)
   Blood Stasis causing abdominal pain and carbuncles and pain due to Blood Stasis from traumatic injury, especially when accompanied by Deficiency Cold
   Postpartum menstruation
   Pregnancy (use with caution)
   Blood Deficiency with chronic Wind-Damp-Bi
3. Moistens the Intestines and unblocks the bowels
   Dry Intestines due to Blood Deficiency
4. Reduces swelling, expels pus, generates flesh and alleviates pain
   Sores and abscess (Chuang Yung), internally and topically
5. Stops coughing and treats dyspnea
   Used adjunctively for coughing
6. Tonifies the Blood while suppressing Parasites
   Gu Sydnrome (Fruehauf, 1998)
   Chronic inflammatory disease (Fruehauf, 2015)

Standard Dosage: 6-12g in decoction.
Cautions: It is contraindicated in cases of Damp-Heat stagnating in the Middle, Lung Heat with Phlegm Fire, and Yin deficiency with effulgent Yang because it is warm and sweet in properties. In addition, it should be used with caution in cases of loose stool because it can moisten intestines to smooth stool.

Many sources recommend using caution, avoiding or only taking under guidance of a TCM physician during pregnancy as it can cause uterine contractions. However, there are no studies supporting this and the only scientific literature seems to suggest that Z-Ligustilide has anti-spasmodic activities that alleviate dysmenorrhoea by inhibiting uterine contractions (Du et al., 2006; Dietz et al., 2016).

Caution is also advised in breast cancer patients due to its oestrogen stimulating activity. This based upon Lau et al (2005) who found it may stimulate breast cancer growth in vitro, however Yue et al, (2019) demonstrated that it is not that stimulatory in breast cancer both in vitro and in vivo through a series of tests, although they suggested it should still be used with caution in estrogen receptor-positive breast cancer. Conversely, a large population study in Taiwan by Wu et al (2014) found it reduced the subsequent risk of endometrial cancer in breast cancer survivors taking tamoxifen, especially in those of reproductive age.

Pinyin: Fang Ji  Chinese: 防己
Pharmaceutical: Radix Stephaniae Tetrandrae
Taxonomy: Stephania Tetrandra
English: Stephania Root

Tastes: Bitter, pungent, cold
Meridians Entered: Liver, Kidney and Bladder

Actions & Indications:

1. Promotes urination and reduces oedema especially in the lower body
   Edema due to Dampness accumulating in the Lower Jiao with damp leg Qi, borborygmus, abdominal distention, ascites
2. Expels Wind-Dampness and alleviates pain (purges Damp-Heat)
   Wind-Damp-Heat collecting in the channels with fever, red, hot, swollen, painful joints (Wind-Damp-Heat Bi) Painful contractions of the hands and feet

Standard Dosage: 5-10g in decoction.
Cautions: Being bitter and cold, it can easily damage stomach qi, so it should be used cautiously to treat patients with anorexia and weak constitution due to yin deficiency.

This herb is prohibited from use in the UK under the banned and restricted herbal ingredients list issued by the MHRA because it can also refer to certain Aristolochia species which contain toxic aristolochic acid. In some European countries with statutory testing of imports the species can be identified but the UK has chosen to ban all species to avoid regulation. It us generally substituted with Yi Yi Ren and Hai Tong Pi.

Pinyin: Bi Xie  Chinese: 萆薢
Pharmaceutical: Rhizoma Dioscoreae Hypoglaucae
Taxonomy: Dioscorea Hypoglauca
English: Fish Poison Yam Rhizome / Tokoro / Long Yam Root / Seven-Lobed Yam (Mian Bei Xie)

Tastes: Bitter, bland
Meridians Entered: Kidney and Stomach

Actions & Indications:

1. Separates the pure from the turbid (resolves turbid Dampness in the Lower Jiao)
   Turbid Dampness in the Lower Jiao with cloudy urine, vaginal discharge
   Deficiency Heat or Damp-Heat
2. Expels Wind-Dampness, relaxes the sinews and unblocks the Luo channels
   Wind-Damp Bi or Damp-Heat Bi with low back pain, numbness or stiffness of the lower extremities, muscle aches (mild effect)
3. Clears Damp-Heat from the skin
   Damp-Heat skin lesions (eczema, pustular sores)

Standard Dosage: 5-10g in decoction.

Pinyin: Gui Ban  Chinese: 龟板
Pharmaceutical: Carapax et Plastrum Testudinis
English: Fresh-Water Turtle Plastron

Tastes: Sweet, salty, cold
Meridians Entered: Liver and Kidney

Actions & Indications:

1. Nourishes Yin and anchors Yang
   Yin Deficiency with Yang Rising with fever, night sweats, dizziness, tinnitus and steaming bone disorder
   Kidney and Liver Yin Deficiencies generating Internal Wind with facial spasms and tremors of the hands and feet
2. Benefits the Kidneys and strengthens the bones
   Kidney Yin Deficiency with soreness of the lower back, weakness in the legs, retarded skeletal development in children or failure of the fontanel to close
3. Nourishes the Blood, enriches Yin and stabilizes the Chong and Ren channels
   Red and white vaginal discharge or uterine bleeding
4. Cools the Blood and stops uterine bleeding
   Blood Heat causing excessive menstruation or uterine bleeding
5. Nourishes the Blood and tonifies the Heart
   Heart Yin and/or Blood Deficiencies with anxiety, insomnia and forgetfulness
6. Treats non-healing sores and ulcerations
   Non-healing sores and ulcerations

Standard Dosage: 10-15g in decoction.
Cautions: Animal products are prohibited from use in the UK under the Medicines Act 1968 ch. 67 which restricts herbalists to the use of plant products only. It is generally substituted with Mo Han Lian and Nu Zhen Zi or Xuan Shen.

Turtles may also act as viral reservoirs and have been proposed as the potential intermediate host for coronavirus between bats and humans (Liu et al., 2020).