History of Traditional Asian Herbal Medicine
demonstrates that Asian herbal medicine was practiced in Asia as early as the second millennium B.C. The primary
healthcare providers in Asia at that time were shamans, most of whom
were women. And the primary view of disease and medicine was that
disease is the manifestation of malevolent spirits, ghosts and demons
that must be expelled through ritual, incantations, spells and herbal
prescriptions. The aromatic scent of herbs such as Rou Gui (cinnamon), Wu Zhu Yu
(evodia) and Ai Ye (artemisia) were believed to have magical properties
that affected demons or a person's spiritual powers.
Historical records of the origins of Asian herbal pharmacology are
unclear. The two most prominent nations noted to have documented
the earliest use of herbal medicine are Korea and China. Perhaps
the questions of "who" and "when" are less important than those of
"what" and "how" as throughout the history of the two nations, there
have been repeated mergings and separations of territory, and
presumably culture to a certain extent, through war,
conquests, losses and more conquests of territories within the nation now known as China.
According to Korean historical archives, edible medicine was documented
as early as
the Go-Chosun era (occupying the Western
coast of the Yellow Sea, Southern Manchuria and Korean Peninsula between 2,333 B.C. to 238 B.C.) with
the usage of herbs such as
garlic and wormwood for curative purposes. As it applies to the
"what" and "how" questions, these herbs are not found in ancient Chinese
pharmacology giving rise to the idea that at certain periods, each
nation developed unique practices in their identification and
application of herbs.
On the other hand, the Chinese consider Yellow Emperor's Inner Classics of Medicine (Huang Di Nei Jing
, 206 B.C.) compiled by various unknown authors as the foundation of
traditional Chinese medicine (and Acupuncture) theory. Similarly, their
archetype of Asian materia medica (herbal medicine) was a compilation
of works called the Divine Husbandman's Classics of Materia Medica
published around 100 A.D. In it, the materia medica had been
expanded from 28 substances noted in the Huang Di Nei Jing,
to 364 substances derived from
botanical, mineral and zoological sources.
By this time, medicine across Asia had evolved from a spirit
view to one based on the natural order of things and on their
relationships in nature which were observed to have universal validity.
This philosophy of universal order is based on the complementary
opposites of Yin and Yang and the Five Elements. The healing power of
herbs was no longer considered to be spiritual in nature but rather
inherently medicinal as their effects on symptoms were empirically
Throughout the centuries the materia medica was expanded in breadth,
scope and complexity as contributions from across Asia and the Middle
East were propagated through trade routes. It is possible that many
cultures including the Egyptians, Mesopotamians, Greco-Romans, Muslims
and East Indians contributed the study, cultivation and application of
their native medicinal flora and fauna to the composite of what is
known today as traditional Asian herbal medicine.
At the same time traditional Asian medicine (TAM) doctors in both Korea and China developed
more systematic ways to use medicinal herbs based on theoretical
linkages or relationships. These relationships correlate herbal
components such as energetic properties (taste and temperature); the
specific organ channels entered; their specific actions on the body;
their effects on specific pathogens; their energetic directional
tendencies; their relationship to the Five Elements; their
contraindications and incompatibilities; their interactions and
potentiations; and more. Through these relationships
prescription-writing came to be developed. Prescription-writing is the
art and science of combining two or more herbs together to make a
Today, more than 20,000 plants, minerals and zoological products have
been identified throughout Asia as having medicinal properties. Of
these, about a thousand are studied in the academic setting and about
300 may be commonly found in a well stocked pharmacy.
Properties of Herbs
Properties of herbs generally refer to their
nature (temperature) characteristics. Similar to the continuum theory
of Yin and Yang, herbs are identified along a Cold-Hot continuum.
Within the Asian materia medica, the temperature categories are:
- Very Cold (Utmost Yin)
- Slightly Cold
- Slightly Warm
- Very Hot (Utmost Yang)
Temperature of an herb is one of the primary characteristics
influencing the initial determination of its clinical use. It should be
noted that temperature is not a measurable characteristic but rather,
their classification evolved around the patient's reaction to the herb.
In theory, a cold-natured disorder is warmed by warming herbs.
Conversely, a hot-natured disorder is cooled by cooling herbs. In the
clinical setting however, cold-natured herbs may be chosen even for
cold-natured disorders based on their therapeutic actions. However, the
cold nature of such herbs must be balanced by including other herbs in
the prescription formula that are sufficiently warming in nature.
In early classical texts, herbs and foods were
ascribed one of the five taste characteristics based on the model of
the Five Elements correspondences. The five tastes were later expanded
to include other taste characteristics that do not have a direct Five
Each taste characteristic has specific effects and also partly
determines the substance's therapeutic function as well as its
The classification of tastes and their general effects in Asian herbal medicine consist of the following:
A. Sour or Astringent
- Corresponds to Wood Element.
- Enters the Liver Channel.
- Sour is astringent and prevents the leakage of Qi and fluids.
- Sour travels in the sinews so that in diseases of the sinews, excess sour should be avoided.
- Corresponds to Fire Element.
- Enters the Heart Channel.
- Bitter drains Heat and dries Dampness.
- Bitter travels in the bones so that in diseases of the bones, excess bitter should be avoided.
D. Acrid or Pungent
- Corresponds to Earth Element.
- Enters the Spleen Channel.
- Sweet tonifies, harmonizes and moistens.
- Sweet travels in the flesh so that in diseases of the flesh, excess sweet should be avoided.
- Corresponds to Metal Element.
- Enters the Lung Channel.
- Pungent disperses and moves.
- Pungent travels in the Qi so that in disease of the Qi, excess pungent should be avoided.
- Corresponds to Water Element.
- Enters the Kidney Channel.
- Salty purges and softens hardness.
- Salty travels in the Blood so that in diseases of the Blood, excess saltiness should be avoided.
- Bland leaches out dampness and promotes urination.
- Aromatic is not exactly a taste but a 'temperature' characteristic.
- Aromatic describes an herb's ability to
penetrate through turbidity and thickness to 'awaken' certain functions
such as the sluggish digestive function of the Spleen or the dulled
senses of the Mind's sensory orifices.
Herbs are classified into functional categories
based on their most important and more commonly used therapeutic
function. The vast majority of the herbs can fit into multiple
categories. For the sake of consistency, nomenclature and study, each
herb has been traditionally placed under one of the following
- Warm Herbs that Release the Exterior
- Cool Herbs that Release the Exterior
- Drain Fire
- Cool the Blood
- Clear Heat and dry Dampness
- Clear Heat and relieve Toxicity
- Clear and relieve Summerheat
- Harsh Expellants
- Drain Dampness
- Dispel Wind-Dampness
- Cool and transform Phlegm-Heat
- Warm and transform Phlegm-Cold
- Relieve Coughing and Wheezing
- Aromatic herbs that transform Dampness
- Relieve Food Stagnation
- Regulate the Qi
- Stop Bleeding
- Invigorate the Blood
- Warm the Interior and expel Cold
- Tonify the Qi
- Nourish the Blood
- Nourish the Yin
- Tonify the Yang
- Stabilize and Bind
- Anchor, Settle and Calm the Spirit
- Nourish the Heart and calm the Spirit
- Aromatic Substances that open the Orifices
- Extinguish Wind and stop Tremors
- Expel Parasites
- Herbs for External Application
The identification of the specific Channels 'entered' by an herb is
another principal way an herb's therapeutic action is manifested. Herbs
are said to enter one or more of the 12 Primary Organ Channels as a way
to treat pathologies related to those Organs and Channels. It is this
relationship and correlation with the Channel theory that enables the
use of herbs within the theoretical framework of traditional Asian
medicine. Were it not for the identification of an herb's capacity for
Channel entry, clinical usage may well be limited in scope to treating
discrete symptoms rather than the systemic disharmony.
In addition to channel entry by an herb, certain herbs are said to have
guiding activities. This means that those herbs, when added to an
herbal formula, have the capacity to focus the actions of other herbs
to a particular Channel and its related Organ.
For additional information on this topic please see the section on Channels
Contraindications and Prohibitions
Because of an herb's temperature characteristics, functional effects
and, and in modern terms their biochemical behaviors, certain
combinations of herbs are deemed to be antagonistic or incompatible.
Consequently these combinations should be avoided less the combination
should either reduce the efficacy of one or the other or produce side
Contraindications are noted for many herbs. Contraindications and
cautions apply to certain conditions and constitutions where use of the
contraindicated herb must be done with caution. In
prescription-writing, contraindicated herbs may sometimes be used with
care as long as proper mitigating and harmonizing substances (herbs)
In the example given below for Dang Gui
, the herb is contraindicated in
cases of Yin Deficiency with Heat signs. However, when necessary and as
appropriate, the herb may be used in a prescription formula treating a
Yin Deficiency pattern as long as herbs that nourish Yin and cool the
Heat are included to mitigate the contraindication.
Functions and Indications
As is the case for acupuncture points, herbs are also known to have
multiple functions and indications. The differences between a function
and indication can be explained as follows:
- A function may be thought of as a Treatment Strategy or Treatment Principle.
- A Treatment Strategy/Principle can be thought of as a summarization and general principle, or mechanism of action.
- Examples include: Clear Heat; Disperse Cold;
Drain Dampness; Resolve Phlegm; Descend Rebellious Qi; Cool the Blood;
Remove Obstruction; Expel Wind; Calm the Mind; Tonify and Strengthen Qi; Harmonize
Blood; Nourish Yin; Supplement Yang; etc.
- Indications refer to the discrete symptoms for which an herb is effective.
- Examples include: cough; abdominal
pain; insomnia; headache; dizziness; spasms; blurred vision; skin itch;
frequent urination; etc.
An example is given on the properties, functions, indications and contraindications of an important herb, Dang Gui
, as presented in the book, Materia Medica, by Bensky and Gamble:
Dang Gui (also called 'Dong Quai' or 'Dang Kuei')
- English name: Angelica root
- Properties: Sweet, Pungent, Bitter, Warm
- Channels entered: Heart, Liver, Spleen
- Function 1: Tonifies Blood and regulates Menses.
- Indications 1:
Blood Deficiency patterns with such symptoms as pallid, ashen
complexion, tinnitus, blurred vision, and palpitations. Also for
menstrual disorders such as irregular menstruation, amenorrhea,
- Function 2: Invigorates and harmonizes the Blood and disperses Cold.
- Indications 2:
Stops pain due to Blood Stasis. For abdominal pain, trauma injury and
carbuncles. Also for Blood Deficiency with chronic Wind-Damp Painful
- Function 3: Moistens Intestines and unblocks the Bowels.
- Indications 3: Dry Intestines due to Blood Deficiency.
- Function 4: Reduces swelling, expels pus, generates flesh, relieves pain.
- Indications 4: Treats sores and abscesses where its ability to both tonify and invigorate the blood leads to improvement.
- Contraindications: Contraindicated for Yin Deficiency with Heat signs.
- Caution: Diarrhea or abdominal distention.
Art and Science of Prescription-writing
Prescription-writing involves combining two or more substances to make a formula for clinical use.
The science of prescription-writing requires intimate knowledge about
the empirical components of herbs as briefly summarized above including
their properties, categories, channels entered, contraindications,
functions and indications, as well as aspects not discussed including
their interactions, dosages, preparation, storage, and more.
To aid the practitioner in the selection of herbs, classical texts have
provided various theories and guidelines on herbal combination. One of
the more popular guidelines emphasizes the following features to
consider in combining or avoidance of combining certain substances:
- Mutual Accentuation: combining based on similar functions to accentuate their therapeutic actions.
- Mutual Enhancement: combining substances with different actions to enhance the effect of the primary herb.
- Mutual Counteraction and Suppression: combining of substances that will reduce a substance's toxicity or side effects.
- Mutual Antagonism: combining based on the ability of two substances to minimize or suppress an herb's positive actions.
- Mutual Opposition: combining of substances that would produce side effects or toxicity.
The Artistry of prescription-writing is, like the art of acupuncture points
combination, more elusive. Artistry applies to the way a practitioner
selects a particular group of herbs, among those having similar properties and behavior,
that will not only produce a desired effect, but do so in a way that
will address the patient's underlying condition in an harmonious way.
Harmony is the balanced end result of the prescription's overall effect on the
patient. To arrive at harmony requires, to some degree, a judgment
call regarding the particular herbs selected.
As it was written about the artistry of acupuncture points selection,
artistry of Asian pharmacology begins with knowledge. Knowledge then is
flavored by one's creativity. And creativity must evolve through
failures and mature through successes.