This product is the rhizome of the perennial epiphytic fern species Drynaria fortunei or Drynaria baronii of the family Polypodiaceae. The former is mainly produced in Zhejiang, Hubei, Guangdong, Guangxi, and Sichuan; the latter is mainly produced in Shaanxi, Gansu, Qinghai, Sichuan, and other regions. It can be harvested throughout the year. After removing the leaves and scales, it is washed, sliced, and dried. It is used raw or after sand-frying.

bubble_chart Properties and Meridians

Bitter, warm. act on liver and kidney channels.

bubble_chart Efficacy

Promote blood circulation and heal injuries, tonify the kidneys and strengthen bones.

bubble_chart Indications

1. Used for falls, sprains, or incised wounds, injury to tendons and bones, swelling and pain. This product can promote blood circulation, mend bones and tendons, and relieve pain. For treating fall injuries, it can be used alone by soaking in wine for oral administration and external application; for treating incised wounds, tendon displacement, and broken bones, it is used with pyrite, myrrh, etc., such as in Shenghui Fang fortune's drynaria rhizome powder.
2. Used for kidney-deficiency lumbago, weak legs, tinnitus, deafness, toothache, chronic diarrhea, etc. This product, bitter and warm, enters the liver and kidney meridians, has the effects of warming and tonifying kidney yang, strengthening bones and tendons, and benefiting deficiencies. For treating kidney-deficiency lumbago and weak legs, it is used with Psoralea, Achyranthes Root, etc.; for treating kidney deficiency tinnitus, deafness, toothache, it is used with Prepared Rehmannia Root, Asiatic Cornelian Cherry Fruit, etc.; for treating kidney deficiency chronic diarrhea, Bencao Gangmu recommends grinding this product into powder, putting it into pig kidneys, and eating it after heating. Modern clinical practice has shown that this product has certain efficacy in treating streptomycin side effects.
3. In addition, this product can also treat alopecia areata, vitiligo, etc.

bubble_chart Documentation

1. Kaibao Bencao: "Mainly breaks blood stasis, stops bleeding, and heals injuries and fractures."
2. Bencao Gangmu: "Treats tinnitus and kidney deficiency chronic diarrhea, toothache." "In the past, a certain Mr. Wei suffered from chronic diarrhea, and all doctors were ineffective. He was on the verge of death. I used this medicine powder, put it into a pig kidney, roasted it, and gave it to him to eat, and it immediately stopped."
3. Bencao Congxin: "Treats bone wilting, hair loss after illness, boil with wild rose branches and apply the decoction."

bubble_chart Usage and Dosage

Decoct for oral use. Apply an appropriate amount externally.

bubble_chart Cautions and Contraindications

Use with caution in cases of yin deficiency without internal heat or static blood.

bubble_chart Modern Pharmacology

This product contains hesperidin, dihydroflavonoid glycosides from Fortune's Drynaria Rhizome, and acids from Fortune's Drynaria Rhizome, among others. Fortune's Drynaria Rhizome can promote bone absorption of calcium and increase the levels of blood calcium and phosphorus, which is beneficial for the healing of fractures. This product has a certain effect on improving the function of chondrocytes and delaying cell degeneration.