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Introduction To Prepared Rehmannia Root (shu di huang)








Prepared Rehmannia Root (shu di huang) 

Radix Rehmanniae Praeparata


Properties: Sweet in flavour, slightly warm in nature, it has affinity to the heart, liver and kidney channels. Being sweet in flavour, warm, moist and greasy in nature, it can replenish heart-and liver-blood and also can nourish both liver-and kidney-yin, serving as a main herb for warming and enriching essence and blood. It is often used to treat syndromes of blood-deficiency, deficiency of both liver-yin and kidney-yin as well as severe insufficiency of kidney essence. But due to its greasy property which is easy to hinder the digestive function of the stomach, it is usually used with herbs for resolving dampness and appetising as fructus Amonmi, etc.

Effects: Replenishing blood and tonifying Yin.


1. For blood deficiency syndrome manifested as pale, dizziness, tinitus, palpitation, insomnia, irregular menstruation, it is often used together with Radix Angelicae Sinensis, Rhizome Ligustici Chuanxiong and Radix Paeoniae Alba to enrich blood and regulate menstruation, as in Decoction of Four Ingredients (Siwu Tang).

2. For Yin-deficiency of both the liver and kidney marked by lassitude of the loins and legs, dizziness, tinitus, night sweat, spermatorrhea, fever due to Yin-deficiency, it is often used with Rhizoma Dioscorear, Fructus Corni, Cortex Moutan Radicis, Rhizoma Anemarrhenae to nourish Yin, replenish kidney, clear away heat and reduce ministerial fire, as in Bolus of Six Herbs Including Rehmannia (Liuwei Dihuang Wan).

Besides, it can also be used to treat diabetes with internal heat.

Dosage and Administration: Ordinary dosage 10-15g, 30g at large dose. This herb is sticky and greasy in property and can hinder digestion, so it is usually used with appetising herbs such as Fructus Amomi Pericarpium Citri Reticulatae, etc.

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