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Da Huang

大黃

  • State/School

    California License Exams, Pacific College Comps

  • Pharm Name

    Rhei Radix et Rhizoma

  • Common Name

    Chinese Rhubarb Root

  • Category

    Downward-Draining Herbs/Purgatives

  • Ingredients

  • Taste

    Bitter

  • Pao Zhi

    Wine-washed to clear & descend upper body fire; often used for Large Intestine heat toxin causing redness of the eyes, toothache, mouth ulcers & restless heat in the chest. Charred to reduce its downward draining action and break up blood stasis while strengthening its ability to stop bleeding; often used for heat accumuating in the Intestines causing bloody stool.

  • Temperature

    Cold

  • Action / Indication

    1. Purges the bowels: best used to treat constipation due to excess heat, and yang ming patterns with high fever, profuse sweating, extreme thirst, constipation, abdominal distention and pain, and delirium. May also be used for other types of constipation with appropriate herbs.
    2. Drains fire by purging: used to clear fire flaring upward, presenting with sore swollen throat, mouth ulcer, gum infection, splitting headache, with red eyes, red face, and irritability. May also use topically for skin sores and ulcers, to relieve swelling and redness.
    3. Cools reckless hot blood and drains heat accumulations: used to treat vomiting of blood, epistaxis during menstruation, hemoptysis, blood in the stool, bleeding hemorrhoids, and intestinal abscesses.
    4. Unblocks blood stagnation: used to treat amenorrhea, fibroids, bruises, and postpartum pain.
    5. Clears damp-heat and stimulates urination: used to treat painful urination, and damp-heat jaundice.
  • Treatment Principles

    Purges the Bowels
    Drains Fire
    Breaks Accumulations
    Drains Damp-Heat
    Cools Blood
    Moves Stagnant Blood

  • Contraindication

    Contraindicated during pregnancy, for nursing mothers, qi and blood deficiency, and cold from deficiency of the Spleen and Stomach. Use extreme caution during menstruation, or post-partum. Allergic reactions to this herb have been reported (with flushing, rash, and wheezing).

  • Dosages

    3-12g. May use raw to enhance purgative effect, but use extreme caution, as overdosage of the raw herb can be toxic. Cook longer than 10 minutes to reduce the purgative effect. Wine or vinegar fry to

  • Meridians

    HT, LI, LIV, ST, SP

  • Tom's Comment

    1. Da Huang is a very commonly used laxative. It is used in acute management of constipation. Prolonged use of this herb may cause dependency.
    2. Cooking Da Huang for less than 5 minutes preserves its laxative ability.
  • Source

  • Formula Type