Pinyin: Yan Hu Suo / Xuan Hu Suo  Chinese: 延胡索 / 玄胡索
Pharmaceutical: Rhizoma Corydalis
Taxonomy: Corydalis yanhusuo seu ambigua seu glaucescens seu repens seu ternata seu turtschaninovii
English: Corydalis Rhizome

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

Actions & Indications:

1. Invigorates the Blood, regulates Qi and alleviates pain
   Chest and rib-side pain
   pain in stomach duct and abdomen, gastrointestinal spasm
   neuralgia
   Amenorrhea and dysmenorrhea, postpartum stasis stagnation abdominal pain
   Neuralgia
   Painful swelling from knocks and falls
2. Promotes sleep
   Insomnia

Standard Dosage: 3-10g in decoction.
Cautions: Avoid in pregnancy.

Pinyin: San Leng  Chinese: 三棱
Pharmaceutical: Rhizoma Sparganii
English: Burr-Reed Rhizome

Tastes: Pungent, bitter, neutral
Meridians Entered: Liver and Spleen

Actions & Indications:

1. Forcefully breaks up Blood Stasis, regulates Qi and alleviates pain
   Blood Stasis with amenorrhea, dysmenorrhea, postpartum abdominal pain and abdominal masses
   Relieves the symptoms of Gu Sydnrome while suppressing parasites (Fruehauf, 1998)
   Chronic inflammatory disease (Fruehauf, 2015)
2. Dissolves accumulations
   Food Stagnation and Qi Stagnation with severe abdominal pain and distention
3. Regulates menstruation
   Menstrual irregularities
4. Promotes lactation
   Agalactia

Standard Dosage: 3-10g in decoction.
Cautions: Same as E Zhu. This herb is drastic in property with the disadvantage of consuming qi and impairing blood. Do not overtake long. Prohibited for pregnant women and during menstrual periods.

Pinyin: E Zhu  Chinese: 莪朮
Pharmaceutical: Rhizoma Curcumae zedoariae
Taxonomy: Curcuma zedoaria
English: White Turmeric Root

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

Actions & Indications:

1. Invigorates Blood circulation, dispels Blood Stasis, regulates Qi and alleviates pain
   Blood Stasis with abdominal pain, dysmenorrhea, amenorrhea, abdominal masses and epigastric masses
2. Dissolves accumulations and alleviates pain
   Food Stagnation with pain, distention, fullness and constriction in the chest and abdomen
   Childhood nutritional impairment
   Relieves the symptoms of Gu Sydnrome while suppressing parasites (Fruehauf, 1998)
   Chronic inflammatory disease (Fruehauf, 2015)

Standard Dosage: 3-15g in decoction.
Cautions: This herb is drastic in property with the disadvantage of consuming qi and impairing blood. Do not overtake long. Prohibited for pregnant women and during menstrual periods.

Due to its ability to increase bile secretion, caution should be used in cases of gallstones and avoided in biliary tract obstruction.

Pinyin: Gui Zhi  Chinese: 桂枝
Pharmaceutical: Ramulus Cinnamomi
Taxonomy: Cinnamomum cassia
English: Cinnamon Twig

Tastes: Pungent, sweet, warm
Meridians Entered: Lung, Heart, Kidney, Liver

Actions & Indications:

1. Releases the Exterior, assists Yang, adjusts the Ying and Wei and releases the muscle layer
   Taiyang Wind Strike (Taiyang Zhongfeng, 太阳中风) - a weak person who catches cold easily with spontaneous sweating, aversion to drafts, fever and chills, nasal congestion, stiff and aching head and muscles
2. Warms the channels and collaterals to relieve pain
   Wind-Cold-Damp Bi
3. Unblocks Yang and transforms Qi and thin mucus
   Edema due to Cold-Phlegm or Yang Qi Deficiency with urinary dysfunction, dizziness and palpitations
4. Assists Heart Yang and warms and facilitates the flow of Yang Qi in the chest
   Palpitations due to Yang Obstruction in the chest due to Stagnation or Deficiency
   Listless chest Yang with upward movement of Phlegm and thin mucus and disorderly descent of Lung Qi with shortness of breath, chest and back pain and palpitations
   Heart and Spleen Yang Deficiency
5. Warms and facilitates the flow of Qi through the channels and collaterals and Blood through the vessels
   Wind-Cold-Damp Bi
   Blood Stasis due to Cold, causing amenorrhea or dysmenorrhea with or without abdominal masses
6. Warms the Middle and directs Turbid Yin downward
   Middle Jiao Yang Deficiency
   Heart and Spleen Yang Deficiency (patient usually craves sweets)
7. 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, prevent forgetfulness, and render the face bright and efflorescent, thus forever looking charming, like a child's face. 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: 3-10g in decoction for exterior conditions, or up to 15g for Bi Syndromes.
Cautions: This herb induces heat, damages the yin and moves blood. It is prohibited for those with warm pathogens, yin deficiency with effulgent fire, or reckless movement of the blood due to heat in the blood. Use with caution in pregnant women.

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.