中草藥
Introduction
Chinese herbal medicine is a major part of traditional Chinese medicine, which focuses on restoring a balance of energy, body and spirit to maintain health rather than treating a particular disease or medical condition. Herbs are used to restoring balance by nourishing the body.
Chinese herbal medicine is not based on western conventional concepts of medical diagnosis and treatment. Practitioners attempt to prevent and treat imbalances of body, for those having cancer or other diseases, they employ complex combinations of herbs, minerals, and plant extracts.
Chinese herbal medicine uses a variety of herbs, in different combinations, to restore balance of the body (see Astragalus, Ginkgo, Ginseng, Green Tea, and Siberian Ginseng). Herbal preparations are said to prevent and treat hormone disturbances, infections, breathing disorders, and a vast number of other ailments and diseases. Some practitioners claim herbs have the power to prevent and treat a variety of cancers. (see Astragalus, Ginkgo, Ginseng, Green Tea, Siberian Ginseng).
In China, there are over 3,200 kinds of herbs, 300 minerals and animal extracts, and over 400 formulas used. One herbal formulation may consist of 4 to 12 different ingredients, being taken in the form of teas, powders, pills, tinctures, or syrups.
In Chinese herbal remedies, there are one or two herbs that are said to have the greatest effect on the disease. The other herbs in the formula treat minor aspects of the problem, lead the formula to specific parts of the body, and help all the herbs work more efficiently.
Origins and history
Native cultures of countries all over the world have traditionally used herbs to maintain health and treat illnesses. Chinese herbal medicine developed along with Chinese culture from tribal roots. By 200 BC, traditional Chinese medicine was firmly established, and by the first century AD, a list of medicinal herbs and herbal formulations had been developed.
The classic Chinese book on medicinal herbs was written during the Ming Dynasty (1152-1578) by Li Shizhen. It contained nearly 2,000 herbs and extracts. By 1990, the latest edition of The Pharmacopoeia of the People's Republic of China listed more than 500 herbs or extracts and nearly 300 complex formulations.
As Western conventional medicine spread to the East, some traditional Chinese medical practices gradually being regarded as folklore. Since 1949, the Chinese government has supported both traditional and Western medicine use. Chinese herbal medicine became so wide-spread in the United States that in the 1970s in which year president Richard Nixon visited China. Today, practitioners with oriental medicine license from more than 30 states and more than 25 colleges practice in the United States.
Modern utilization
With the increasing popularity of herbal use, many Chinese herbs are sold exclusively and also in formulas. In the United States, Chinese herbs and herbal formulas can be purchased in health stores, some pharmacies, and from herbal medicine practitioners.
Before choosing a mixture of herbs, traditional Chinese practitioner will typically ask the patient about symptoms and do an overall examine, usually focusing on the skin, hair, tongue, eyes, pulses, and voice, in order to detect imbalances in the body.
Dimensions of herb
Herbs are classified into two major dimensions:
- temperature characteristics of the herb, namely hot, warm, cold, neutral, and aromatic;
- taste property of the herb, namely sour, bitter, sweet, spicy, and salty.
The various combinations of temperature and taste give the herb specific properties that can influence the yin and yang of the body. For example, sour, bitter and salty tastes are related to yin, whereas acrid, sweet are attributed to yang. There are herbs that can warm, cool, tonify, and move stagnation, etc. It is also important to understand the multi-quality of the herbs. They always combine several tastes and temperatures and may affect one even to twelve organ systems.
Warm herbs can be used for individual suffering from heat disorders. To keep the equilibrium standard of human body, corresponding herbs should be used together. Likewise, cool herbs can be used with people with cold syndromes while the overall property of the mixture is warm. Neutral herbs are those neither hot nor cold, so they are considered gentle herbs and rarely exist in the pharmacopoeia.
- As for the tastes, sour constricts or consolidates. Herbs of sour taste are often indicated for use in protracted cough, chronic diarrhea, seminal and urinary incontinences, leakage or spermatic fluid, and other conditions related to hypo-metabolism (under-performance). In traditional Chinese medicine, they are seen as deficient or cold syndrome.
- Bitter possesses the function of clearing heat, purging the bowels, lowering the qi, improving appetite and drying dampness or wetness. Bitter herbs are commonly used in fire-heat patterns, such as the acute stage of infectious disease, and the patterns of damp-heat or damp-cold, such as arthritis or leucorrhoea.
- Sweet has the function of toning, improving, moistening and harmonizing many of the important systems of the body, including the digestive, respiratory, immune and endocrine systems. Sweet tastes also relieve urgency and inhibit pain due to the constrictive action of muscles. They are commonly used for treating deficiency patterns such as dry cough, and dysfunction of the gastro-intestinal tract such as spleen and stomach disharmony.
- Spicy disperses, circulates qi and vitalizes blood. This group of herbs can stimulate the sweat glands to perspire, circulate qi, activate the function of meridians and organs and vitalize blood to promote blood circulation. As a whole, spicy herbs have the overall effect of activating and enhancing metabolism. Spicy herbs are commonly used in the treatment of external patterns (catching a cold), when the function of the meridian and organs is weakened and circulation of blood has been impeded. In TCM terminology, this is the stage of qi stagnation and blood cloudiness.
- Salty herbs have the function of softening firm masses and fibrous adhesions. The salty taste purges and opens the bowels. Salty agents are often indicated in sores, inflammatory masses, cysts, and connective tissue proliferation.
The unique characteristic of Chinese herbal medicine is the degree to which formulation is done. In other forms of herbal medicine, especially western herbal medicine, herbs are often delivered singly or combined into very small formulas of herbs with the same function. In contrast, Chinese herbalists rarely prescribe a single herb to treat a condition. They create formulas instead. A formula usually contains at least four to twenty herbs.
Herbal formulas can be delivered in all manners of preparation. Pre-made formulas are available as pills, tablets, capsules, powders, alcohol-extracts, water-extracts, etc. Most of these formulas are very convenient as they do not necessitate patient preparation and are easily taken.
Method of preparing herbal medicine
Decoction is the traditional method of preparing herbal medicine. A decoction is a concentrated form of tea. The practitioner weighs out a day's dosage of each herb and combines them in a bag. A patient is given a bag for each day the herbal formula will be taken. The herbs are then boiled in water by the patient at home. The boiling process takes from 30-60 minutes and the resulting decoction will be consumed several times during the day.
Another modern way of delivering herbs is through granulated herbs, which are highly concentrated powdered extracts. These powders are made by first preparing the herbs as a traditional decoction. The decoction is then dehydrated to leave a powder residue. Practitioners can then mix these powders together for each patient into a custom formula. The powder is then placed in hot water to recreate the decoction. This eliminates the need to prepare the herbs at home, but still retains much of the original decoction's potency.
Useful links：
Specific Conditions:
http://www.nlm.nih.gov/medlineplus/herbalmedicine.html
Herbs A to Z：
http://www.healthy.net/scr/center.aspx?centerid=24
Get to know about herbs(courses and ebooks, skills and recipes, flu care, first aid and so on)
Medicine - Herb/Food Interactions：
http://www.holistic-online.com/herbal-med/hol_herb_med_reac.htm
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