Glossy privet fruits (Nu Zhen Zi) Eclipta herbs (Mo Han Lian)

Er Zhi Wan

Chinese: 二至丸

Pinyin: Èr Zhì Wán

Other names: Two-Solstice Pill

Number of ingredients: 2 herbs

Formula category: Formulas that nourish Yin and tonify

Conditions for which it may be prescribed: InsomniaHemorrhageProlonged periods and three other conditions

  1. Nourishes Liver Yin
  2. Nourishes Kidney Yin

Contraindications: Contraindicated for people with weak digestive systems, because the two herbs... Contraindicated for people with weak digestive systems, because the two herbs in this formula are cooling. see more

Source date: 1534 AD

Source book: Essential Formulas to Support Longevity

Er Zhi Wan is a 2-ingredient Chinese Medicine formula with Glossy Privet Fruits (Nu Zhen Zi) and Eclipta Herbs (Mo han lian) as principal ingredients.

Invented in 1534 AD, it belongs to the category of formulas that nourish Yin and tonify. Its main actions are: 1) nourishes Liver Yin and 2) nourishes Kidney Yin.

In Chinese Medicine health conditions are thought to arise due to "disharmonies" in the body as a system. These disharmonies are called "patterns" and the very purpose of herbal formulas is to fight them in order to restore the body's harmony.

In this case Er Zhi Wan is used by TCM practitioners to fight patterns like Kidney Yin Deficiency, Kidney Deficiency or Kidney and Liver Yin Deficiency causing Heat in the Blood. From a Western Medicine standpoint, such patterns can give rise to a range of conditions such as prolonged periods, abnormal uterine bleeding or intermenstrual bleeding for instance.

On this page, after a detailed description of each of the two ingredients in Er Zhi Wan, we review the patterns and conditions that Er Zhi Wan helps treat.

The two ingredients in Er Zhi Wan

Nu Zhen Zi is a king ingredient in Er Zhi Wan. Like the name indicates, it means it has more power than other ingredients in the formula.

1. Glossy Privet Fruits (Nu Zhen Zi)

Part used: Dried fruit

Nature: Neutral

Taste(s): BitterSweet

Meridian affinity: KidneyLiver

Category: Tonic herbs for Yin Deficiency

Nu Zhen Zi is sweet, bitter, and cool. It enriches the Kidneys and nourishes the Liver. Together with Mo han lian it nourishes the Yin aspects of the Liver and Kidneys, without being cloying.

Learn more about Glossy Privet Fruits (Nu Zhen Zi)

Mo han lian is a king ingredient in Er Zhi Wan. Like the name indicates, it means it has more power than other ingredients in the formula.

2. Eclipta Herbs (Mo han lian)

Part used: Dried aerial part

Nature: Cold

Taste(s): SourSweet

Meridian affinity: KidneyLiver

Category: Tonic herbs for Yin Deficiency

Mo han lian is sweet, sour, and cold. It supplies the Essence, nourishes the Yin and cools the Blood to stop bleeding. Together with Nu Zhen Zi it nourishes the Yin aspects of the Liver and the Kidneys, without being cloying.

Learn more about Eclipta Herbs (Mo han lian)

Conditions and patterns for which Er Zhi Wan may be prescribed

It's important to remember that herbal formulas are meant to treat patterns, not "diseases" as understood in Western Medicine. According to Chinese Medicine patterns, which are disruptions to the body as a system, are the underlying root cause for diseases and conditions.

As such Er Zhi Wan is used by TCM practitioners to treat five different patterns which we describe below.

But before we delve into these patterns here is an overview of the Western conditions they're commonly associated with:

Prolonged periods Abnormal uterine bleeding Intermenstrual bleeding Menopausal syndrome Insomnia Hemorrhage

Again it wouldn't be correct to say "Er Zhi Wan treats prolonged periods" for instance. Rather, Er Zhi Wan is used to treat patterns that are sometimes the root cause behind prolonged periods.

Now let's look at the five patterns commonly treated with Er Zhi Wan.

The Kidneys is a so-called "Zang" Organ. Learn more about the Kidneys in Chinese Medicine

Kidney Yin Deficiency

Er Zhi Wan is sometimes prescribed by TCM practitioners to treat Kidney Yin Deficiency. This pattern leads to symptoms such as tinnitus, vertigo, dizziness and night sweats. Patients with Kidney Yin Deficiency typically exhibit rapid (Shu), empty (Xu) or floating (Fu) pulses as well as a red tongue with complete absence of coating.

Kidney Yin Deficiency causes false Heat symptoms, such as night sweats, thirst and five palm heat. These signs are from a depletion of Body Fluids and Essence. It can also lead to an insufficient amount of Marrow to fill the Brain, causing poor memory and dizziness. Yin Deficiency of the Kidneys is... read more about Kidney Yin Deficiency

The Kidneys is a so-called "Zang" Organ. Learn more about the Kidneys in Chinese Medicine

Kidney Deficiency

Er Zhi Wan is sometimes prescribed by TCM practitioners to treat Kidney Deficiency. This pattern leads to symptoms such as late period, pale menstrual blood, feeling of cold and sore back. Patients with Kidney Deficiency typically exhibit deep (Chen), empty (Xu), weak (Ruo) or floating (Fu) pulses as well as a pale, red tongue.

Learn more about Kidney Deficiency

The Liver is a so-called "Zang" Organ. Learn more about the Liver in Chinese Medicine

Kidney and Liver Yin Deficiency causing Heat in the Blood

Pulse type(s): Rapid (Shu), Empty (Xu), Fine (Xi), Floating (Fu)

Tongue coating: Complete absence of coating

Tongue color: Red

Symptoms: Tinnitus Dizziness Back pain Dark Urine Night sweats

Er Zhi Wan is sometimes prescribed by TCM practitioners to treat Kidney and Liver Yin Deficiency causing Heat in the Blood. This pattern leads to symptoms such as dizziness, tinnitus, night sweats and back pain. Patients with Kidney and Liver Yin Deficiency causing Heat in the Blood typically exhibit rapid (Shu), empty (Xu), fine (Xi) or floating (Fu) pulses as well as a red tongue with complete absence of coating.

Learn more about Kidney and Liver Yin Deficiency causing Heat in the Blood

The Liver is a so-called "Zang" Organ. Learn more about the Liver in Chinese Medicine

Deficiency of the Liver and Kidney Yin

Er Zhi Wan is sometimes prescribed by TCM practitioners to treat Deficiency of the Liver and Kidney Yin. This pattern leads to symptoms such as sore knees, soreness and weakness in the lower back, weak knees and dry mouth. Patients with Deficiency of the Liver and Kidney Yin typically exhibit a red tongue

Learn more about Deficiency of the Liver and Kidney Yin

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