Pharmaceutical name: 英文藥名﹕ | Arillus Euphoriae Longanae |
Botanical name: 學名﹕ | Dimocarpus longans Lour. Euphoria longans (Lour.) Steud. Pometia pinnata Forst. (long yan of Eastern Taiwan 臺 東 龍 眼 ) |
Pron. in Japanese: 日語發音﹕ | ryuganniku (long yan rou 龍眼肉) |
Pron. in Korean: 韓語發音﹕ | yonganyuk (long yan rou 龍眼肉) |
Pron. in Cantonese: 粵音﹕ | lung4 ngaan5 yuk6 |
Other Names: 別名﹕ | gui yuan 桂圓，yuan yan 圓眼 ，yi zhi 益智，mi pi 蜜脾，long yan gan 龍眼乾 tava (Fijian, Taongan, Samoan name), acai (native name) |
Common Name: 英文名﹕ | longan |
Distribution: 產地﹕ | Guangdong, Guangxi, Fujian, Taiwan, Sichuan provinces of China, and also Philippines, Pacific Islands, Southeast Asia. |
Properties (characteristics)﹕ 性味﹕ | 1. root: slightly bitter, neutral. 2. leaves: slightly bitter, neutral. 3. meat (long yan rou): . 4. seeds: slightly bitter, tart, neutral.
1. 根：微苦，平。 2. 葉：微苦，平。 3. 假種皮(龍 眼 肉 )：甘，平。 4. 種子：微苦，澀，平。 |
Channels (meridians) entered: 歸經﹕ | Long yan rou: heart and spleen 龍 眼 肉 ﹕ 歸 心 ﹐ 脾 經 。 |
| Medical functions: 藥理﹕ | fungus inhibition: water extract of long yan rou (1:2), inhibits Microsporon Audouini in test tube. 抑菌試驗：龍眼肉的水浸劑(1：2)，在試管內對奧杜盎氏小芽胞癬菌有抑制作用。 |
Actions & Indications: 主治﹕ | Root: for Chyluria , leucorrhea, rheumatoid arthritis. Leaves: prevents epidemic influenza, epidemic meningitis, influenza, enteritis, eczema of the scrotum. Long yan rou (edible part of the fruit): as tonic after illnesses, neurasthenia, forgetfulness, palpitation, insomnia. Seeds: stomachache, scalding, bleeding from cut,
根： 乳糜尿，白帶，風濕關節痛。 葉： 預防流行性感冒，流行性腦脊髓膜炎，感冒，腸炎；外用治陰囊濕疹。 假種皮(龍眼肉)： ，病後體虛，神經衰弱，健忘，心悸，失眠。 種子(龍眼核)： 胃痛，燒燙傷，刀傷出血，疳氣痛；外用治外傷
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Chemical ingredients: 化學成份﹕ | meat (long yan ruo) contains: | 假種皮(龍眼肉) 含 | vitamin A, B1, B2 , P, C | 維生素A，B1﹐ B2 P, C | glucose | 葡萄糖 | cane sugar | 蔗糖 | tartaric acid | 酒石酸 | seed contain | 種子含 | saponin | 皂貳 | pigments | 色素 | animo acid | 氨基酸 | 2-amino-4-hydroxymet-hylhex-5-ynoic acid | 2-氨基-4-羥基甲基-己-5-炔酸 | 2-am-ino-4-hydroxyhept-6-ynoic acid | 2-氨基-4-羥基-庚-6-炔酸 | fat | 脂肪油 | tannin | 鞣質 | oil from seeds contain: | 種子油含 | dihydrosterulic acid | 二氫蘋婆酸 | leaves contain: | 葉含: | Quercetin | 槲皮素 | quercitrin | 槲皮貳 | friedelin,C30H50O | 無羈帖 | 16-hentriacontanol,C31H64O | 16-三十一醇 | epifriedelinol,C30H52O | 表無羈帖醇 | β-sitosterol | β-谷甾醇 | sigmateryl-D-glucoside | 豆甾醇及豆甾醯-D-葡萄糖式 |
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Dosage: 用量﹕ | long yan rou: 6 to 15 g. |
Samples of formulae: 處方舉例﹕ | For insomnia caused by heart, spleen and blood deficient: Prescription: long yan rou 30 g, da zao 5 pieces, rice 60 g. Add water to make into porridge at night and take before bed time. 治心脾血虚引起的失眠﹕ 龍眼肉30克， 大 棗5枚，粳米60克 加 水。 晚上 睡前煮成 粥 |
Modern Research: 現代研究﹕ | |
Toxicity & Cautions: 毒素與禁忌﹕ | do not use long yan rou in cases of phlegm-fire (damp heat in the middle jiao / burner) 內有痰火，中焦濕滯停飲者忌服 |