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Ze Xie (Water Plantain Rhizome, Alisma)

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Cold Ze Xie (Rhizoma Alismatis)
Sweet, Bland, Cold
Rhizoma Alismatis
Tone Marks:
zé xiè
Alt Names:
Fu Ze Xie
Marsh Drain


  • Promotes Urination and Drains Damp
    For urinary disorders with pain, difficulty, or dribbling, edema, dizziness, vertigo, and diarrhea. For many disorders associated with damp and water in the lower jiao.
  • Drains Kidney Deficiency Fire
    For spermatorrhea, premature ejaculation, and nocturnal emissions associated with Kidney fire possibly due to damp heat.

Contraindications and Cautions

  • Use caution in cases with Sunken Qi in the Middle Jiao.

Herb-Drug Interactions

  • Ze Xie promotes urination and may interfere with Diuretic drugs (ie - Lasix).

Toxicity and Overdose

  • Overdose or extended use can result in hematuria, electrolyte imbalance, vomiting, nausea, diarrhea, and abdominal pain.


  • 5-10 grams in decoction or up to 30 grams in severe cases 12
  • 4.5 9 grams in decoction 13


  • This herb is excellent at draining Damp due to its sweet, bland, and cold properties. It prevents excess heat from developing when combined with warm tonifying herbs.

Clinical Studies and Research

This Herb Appears in the Following Formulas: