The Processing of Lu Hui
The concentrated juice exsiccation of Aloe barbadensis Miller. or A. ferox Miller of family Lily. The former is called Lao Lu Hui, while the latter is known as Xin Lu Hui.
Mainly in Africa, also produced in Yunnan, Guangdong and Guangxi provinces of China.
The juice of plant can be gathered and then decocted into dense paste all over the year.
The actual smell and taste
Special stink smell, extremely bitter taste.
Dark green or dark brown, crisp, strong smell.
The Effect of Lu Hui
Bitter, cold; large intestine, liver and stomach meridians entered.
Relax bowels with purgative, clear liver fire, expel ascarid.
A. Constipation due to heat accumulation
Being bitter and cold with the action of purgation and heat clearing, it can both relax bowels with purgative and clear heat, which is similar to that of Da Huang. Since it also excels at clearing liver fire and relieving feverish dysphoria, it is much suitable for treating heat constipation accompanied with hyperactivity of liver fire manifested as restless and insomnia, and often combined with heat-clearing and tranquilizing herbs, for example, Zhu Sha in Geng Yi Wan from Yi Xue Guang Bi Ji (Comprehensive Medical Notes).
B. Excess fire in liver meridian
It excels at clearing liver fire and is indicated for excess fire in liver meridian manifested as constipation, yellow urination, dizziness and headache, irritable, convulsion. It is often combined with liver fire-purging herbs, for example, Long Dan, Zhi Zi, Qing Dai, etc. , as in Dang Gui Lu Hui Wan from Yi Xue Liu Shu (Six Books of Medicine).
C. Children's malnutrition
It can resolve accumulation with purgative as well as expel ascarid and cure malnutrition. For children's malnutrition manifested as abdominal pain, yellowish complexion, emaciation and feeble constitution, it is often combined with ascarid-expelling, accumulation-resolving and spleen-invigorating herbs, such as Shi Jun Zi, Bing Lang, Shan Yao, etc.
Dosage and Administrations
Used in pills 1~2 g.
It is contraindicated in cases of patients with hypo-function of stomach and spleen, poor appetite, diarrhea as well as pregnant women.