
Lycium chinense
Also known as Chinese matrimony vine, Chinese wolfberry, goji (fruit), lycium root bark, di gu pi (root bark), gou qi zi (fruit), dì gǔ pí, gǒu qǐ zǐ.
Chinese boxthorn is a sprawling, thorny shrub of the nightshade family, native to East Asia and naturalised widely. Two drugs come from the genus: the famous fruit, gou qi zi, taken chiefly from Lycium barbarum and used as a Liver and Kidney tonic, and the root bark, di gu pi, from both species, which is the subject here. The bark is stripped in spring or autumn and dried into loose, pale, quill-like pieces. It belongs with the herbs that clear deficiency heat and cool the blood, one of the few in that group that is sweet rather than bitter.

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Ask HerbertA thin, flushed patient with fevers that rise in the afternoon and sweats that soak the sheets at night, a red tongue with little coat and a fine rapid pulse, where sweet, moist cooling is wanted rather than bitter drying
A child or adult with a hacking cough, wheeze and yellow sputum but no chills, where lycium bark with mulberry root bark clears the Lung without further drying it
Thirst, hunger and frequent urination with heat signs in a diabetic-type picture, lycium bark added to fluid-generating herbs
The record lists 6 contraindications; open the plate in the library to read them in full.
Di gu pi is the sweet, gentle way to clear heat that comes from depleted yin. Where anemarrhena and phellodendron are bitter and drying, lycium bark cools without stripping fluids, so it suits the thin, flushed, sweaty patient who is already dry.
Temperature: cold. Taste: sweet, bland. Channels: Lung, Liver, Kidney. Actions: Cools the blood and clears heat from deficiency; Relieves steaming bone fever, afternoon tidal fever and night sweats; Clears heat from the Lung and stops cough with heat in the Lung; Cools the blood to stop bleeding from heat (nosebleed, blood in urine or sputum); Clears heat and generates fluids in wasting-thirst disorder; Drains hidden fire without damaging yin.
| Preparation | As written | Metric |
|---|---|---|
| Decoction (pharmacopoeial range, root bark) | 9-15 g dried root bark daily | 9000-15000 mg |
| Decoction, larger dose for stubborn deficiency fever | 15-30 g dried root bark daily, short course | 15000-30000 mg |
| Granules (5:1 concentrate) | 2-3 g two to three times daily | 2000-3000 mg |
| Mouth rinse (traditional, for toothache) | 15 g decocted in 300 mL, used as a rinse several times daily | 15000-15000 mg |
Doses are reproduced from the sources for practitioners and are not a recommendation for any person.
Overview. Chinese boxthorn is a sprawling, thorny shrub of the nightshade family, native to East Asia and naturalised widely. Two drugs come from the genus: the famous fruit, gou qi zi, taken chiefly from Lycium barbarum and used as a Liver and Kidney tonic, and the root bark, di gu pi, from both species, which is the subject here. The bark is stripped in spring or autumn and dried into loose, pale, quill-like pieces. It belongs with the herbs that clear deficiency heat and cool the blood, one of the few in that group that is sweet rather than bitter.
Clinical Notes. Di gu pi is the sweet, gentle way to clear heat that comes from depleted yin. Where anemarrhena and phellodendron are bitter and drying, lycium bark cools without stripping fluids, so it suits the thin, flushed, sweaty patient who is already dry.
Chinese Medicine Profile. Temperature: cold. Taste: sweet, bland. Channels: Lung, Liver, Kidney. Actions: Cools the blood and clears heat from deficiency; Relieves steaming bone fever, afternoon tidal fever and night sweats; Clears heat from the Lung and stops cough with heat in the Lung; Cools the blood to stop bleeding from heat (nosebleed, blood in urine or sputum); Clears heat and generates fluids in wasting-thirst disorder; Drains hidden fire without damaging yin.
Chinese boxthorn stands in 79 documented formulas in the library, among them má hung dèng shi wei wán, xiè bái sǎn, ging xin lián zi yin, ging gu san, di gu pí yin, qin jião biê jiǎ sǎn.

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