Wormwood is used for the malaria treatment
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When it comes to which Chinese herb gains the widest acceptance in the West, wormwood herb, also known as Artemisia annua or Qing Hao in Pinyin, must be one of the hottest candidates. This owes it all to the finding of artemisinin – a malaria drug that has saved millions of lives worldwide especially in developing countries. And the fame of wormwood consummated in 2011 when Tu Youyou, the pharmacologist who first discovered artemisinin in wormwood, won America's respected Lasker Award for that reason. Therefore, Chinese media reports said that this could be the best proof for growing skepticism about the efficacy of traditional Chinese medicine. More than that, what is wormwood used for is more than just the malaria treatment.

Medicinally it mainly refers to the dried aerial part of Artemisia annua L. As a common type of wormwood in the family Compositae, Artemisia annua is native to temperate Asia and later introduced to every corner of the globe. Other names of this plant include annual wormwood, Herba Artemmisiae, sweet Annie, sweet wormwood, sweet sagewort, and so on. In China it is distributed in most areas of the country. It is harvested in summer and autumn when the flowers are going to bloom. After that, it needs to remove the old stems. And it is used fresh or dried in the shade. By the way, Artemisia japonica Thunb., another plant in the same genus, is also used as Qing Hao in some regions of China since it has similar efficacy. However, it can’t treat malaria. So, it is necessary to tell them apart medicinally.

Wormwood herb is an annual herb, 40 to 150cm in height. The whole plant is with a strong odor of volatile oil. Erect stems are with vertical stripes, smooth, hairless, and with multiple branches. Basal wormwood leaves lay flat on the ground and wither when blooming; alternate stem leaves turn green when young and brown when old. Leaf blade is usually tripinnatisect, and with short lobes and tiny powdered pubescence; rachis is with narrow wings on both sides; upper leaves taper downward and become a strip. Small capitulum is spherical, about 2mm in diameter, and with small short soft stems; small involucre is hemispheric; all flowers are tubular and yellow, female flowers outside and bisexual flowers in the center. Achenes are elliptical. Flowering time is from August to October and fruiting time is from October to November. Main habitats are wilderness, hillsides, roadsides, and riverbanks.


WORMWOOD HERB BENEFITS 
In Vol.3, Section 16 of Zhou Hou Bei Ji Fang (Emergency Prescriptions kept in one's Sleeve), Ge Hong, the famous Taoist leader during the Eastern Jin Dynasty, ever briefly mentioned how to use wormwood plant to treat all cold or heat-induced malaria: "gather a handful of fresh wormwood plants, soak them with 2 liters of water, extract the juice by twisting, and drink it all". This is the earliest record about using Artemisia herb to cure malaria, not only in the medical history of Chinese but also the world.

And this brief comment turns out to be a great inspiration to the modern pharmacological studies. In 1971 researchers of Chinese Medicine Research Institute did find valuable clue when they red this text. And based on it they finally got on the right track and discovered the antimalarial drug artemisinin.

As the main active ingredient of Artemisia annua, artemisinin is poorly soluble in water and will decompose and lose efficacy above 60 degrees Celsius. In 1972 the effective monomer of artemisinin was successfully extracted with an organic solvent at low temperature. Artemisinin monomer is a highly effective, fast-acting antimalarial that is with low toxicity. This is completely different from drugs in chloroquine structure.

wormwood is used for the malaria treatment

Wormwood Herb

WORMWOOD RECIPES ON HERBAL REMEDIES 
The Encyclopedia of Chinese Materia Medica says that wormwood is bitter and slightly acrid in flavor and cold in nature. It goes to meridian s of liver and gallbladder. Primary functions are clearing heat, relieving summer-heat, eliminating hectic fever, and preventing malaria. Basic wormwood herb uses and indications include summer-heat, summer-heat and damp, damp-warm syndrome, fever due to yin deficiency, malaria, and jaundice. Recommended wormwood dosage is from 6 to 15 grams in decoction. When used in curing malaria, 20 to 40 grams of dried wormwood or doubling the amount of fresh wormwood is needed. But you should be careful not to cook them too long or the active ingredients would get spoiled. 

1. Qing Hao Bie Jia Tang from Wen Bing Tiao Bian (Detailed Analysis of Warm Diseases). It is formulated with Bie Jia (Soft Turtle Shell), Mu Dan Pi (Tree Peony), Zhi Mu (Anemarrhena Rhizome), Sheng Di Huang (Rehmannia), etc. to treat syndrome of lingering heat in later period of warm diseases or lingering low-grade fever after febrile disease.

2. Qing Gu San from Zheng Zhi Zhun Sheng (The Level-line of Patterns and Treatment). It is combined with Yin Chai Hu (Stellaria), Hu Huang Lian (Picrorhiza Kurroa), Anemarrhena Rhizome, Soft Turtle Shell, etc. to cure deficiency type fever, hectic fever due to yin deficiency, consumptive fever, hot flashes, night sweats, dysphoria in chest, palms, and soles, and red tongue with little coating.

3. Qing Liang Di Shu Tang from Shi Bing Lun (Treatise on Seasonal Diseases). It is matched with Lian Qiao (Forsythia), Hua Shi (Talcum Powder), Xi Gua Cui Yi (Pericarpium Citrulli Vulgaris), etc. to heal exogenous summer-heat, dizziness, headache, fever, and thirst.



 Key words:  Malaria
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