Individual Herbs Notebook

Long Gu

Translation: Dragon's Bone

Pharmaceutical: Ossa Draconis

Other names: Fossilised Bones

Category: Substances that Calm the Spirit



Properties: Sweet, astringent, neutral

Meridans Entered:
Primary: Liver, Heart and Kidney
Extraordinary Vessels: Dai


Traditional Actions/Indications:
  1. Settles anxiety and calms the Spirit
    Agitated Heart and Spirit with emotional distress, restlessness, insomnia, palpitations with anxiety, seizures, or withdrawal mania
  2. Calms the Liver and anchors and preserves Floating Yang
    Irritability, restlessness, dizziness, vertigo, blurred vision and a bad temper due to Liver Yin Deficiency with Liver Yang Rising
  3. Prevents leakage of fluids
    Loss of fluids due to Deficiency with spermatorrhea, night sweats, spontaneous sweating, nocturnal emissions, vaginal discharge and uterine bleeding
  4. Topically generates muscles and astringes ulcers
    Chronic non-healing sores and ulcerations
  5. Treats Ghost Possession
    Said in the Shen Nong Ben Cao Jing to treat Heart and Abdomen Ghost Possession, Spiritual Matters (精物 Jing Wu) and Old Ghosts (老鬼). This refers to difficult to treat disorders thought to be of supernatural origin.
  6. Aids fasting
    Mentioned in the Shen Nong Ben Cao Jing as part of the superior class of animal parts which can, with protracted taking, make the body light, enable one to communicate with the Spirit Light (Shen Ming 神明), and lengthen the lifespan. This may suggest it was part of supplementing the diet when engaging in an "avoiding grain" (Bigu 辟穀) fasting regime to cultivate life (Yangsheng 養生).

Suggested Daily Dosage: 15-30g in decoction.


Cautions: The high mineral content of this medication may prevent the oral absorption of the fluoroquinolone class of antibiotics.

Animal products are prohibited from use in the UK under the Medicines Act 1968 ch. 67 which restricts herbalists to the use of plant products only. It is generally substituted with Bai Shao and Wu Wei Zi.

If viewed from a western perspective as a source of calcium which may cause sleep disturbances, then supplementation or inclusion of high calcium/magnesium content herbs (e.g. Kun Bu) could be considered, especially if other signs such as oesteoporosis or muscle cramps are present and risk of side effects from calcium/magnesium supplements are low (stones, calcified arteries, GI issues). However, this assumes a mechanism which does not match many of the traditional patterns for which it is prescribed.


Appears in 17 formulae listed on this site: (click to display)
Research Links & References: (click to display)