Wu Mei (Mume Fruit)

Chinese Herb Actions

Chinese Herb Dosage

• What is the typical dosage of Wu Mei?

  3–9 g in decoction, with larger doses (up to about 30 g) used traditionally for expelling roundworms or for chronic diarrhea. Charring the fruit (Wu Mei Tan) is the traditional preparation when the aim is to stop bleeding, such as blood in the stool or uterine bleeding.

  Source: owner’s Five Branches notes (dose; charred preparation for bleeding); standard materia medica ranges. Reference only — not a prescription.

Chinese Herb Contraindications & Cautions

• Are there cautions or contraindications for Wu Mei?

  As a sour astringent, Wu Mei can trap pathogens that need to be released, so it is contraindicated where there is an unresolved exterior condition or excess interior heat. It is not suitable in early-stage dysentery or diarrhea with strong damp-heat excess, where its binding action could prolong the problem. Astringent herbs like this treat the manifestation and are usually combined with herbs that address the underlying deficiency.

  Source: owner’s Five Branches notes (contraindications: excess heat, exterior disorders; general cautions for stabilize-and-bind herbs).

Chinese Herb Toxicity & Overdose

• Low. Wu Mei is a food-grade fruit (the smoked Japanese/Chinese plum) with no significant toxicity reported at normal therapeutic doses. It is highly acidic, so very large or prolonged use is a matter for practitioner judgment rather than a documented toxicity.

  Source: materia medica consensus; no toxicity signal in the reviewed research.

Herb-Drug Interactions

• No well-established clinical herb–drug interactions are documented. Wu Mei is rich in organic acids and markedly acidic, so practitioner caution is reasonable where gastric acidity or acid-sensitive medications are a concern. (Flagged for practitioner confirmation — absence of documented interactions is not proof of safety.)

Western / Biomedical Research

Chinese Herb Clinical Studies & Research

Provided as research context — a summary of published biomedical study, not a therapeutic or medical claim.

• Is there modern research on Wu Mei (Prunus mume)?

  Yes, though most is laboratory and animal research. A comprehensive review catalogued roughly 192 compounds in Prunus mume — chiefly organic acids (such as citric and malic acid) and phenolics — and summarized antimicrobial, antioxidant, anti-diabetic and hepatoprotective activity. A separate study found the fruit’s phenolic compounds active against enterobacteria in vitro, which is consistent with, though not proof of, its traditional use in dysentery and intestinal disorders.

  Sources: PMC 8195681 / PMID 34122104 (review of Prunus mume phytochemistry and pharmacology, Front Pharmacol, 2021); PMID 29386480 (antimicrobial activity of Prunus mume phenolics against enterobacteria, Molecules, 2018). Research context, not a therapeutic claim.

Chinese Herb Notes

• How is Wu Mei different from other binding herbs, and how is it combined?

  Among the intestine-binding astringents, Wu Mei is set apart by two extra actions — it generates fluids and it kills parasites. He Zi, by contrast, has a stronger descending action for chronic cough and diarrhea, while Wu Mei uniquely quenches thirst and calms roundworms. Compared with Wu Wei Zi (also sour and warm, also astringes the Lung for chronic cough), Wu Mei generates fluids and expels worms, whereas Wu Wei Zi additionally tonifies the Kidney and calms the spirit.

  Its classic combination:

  • Wu Mei Wan (Mume Pill) — Wu Mei is the chief herb in this famous formula for roundworm, which pairs it with warming and bitter-cold herbs to settle ascaris in a mixed cold-and-heat pattern.

  Source: owner’s Five Branches notes (comparison of intestine-binding herbs; Wu Wei Zi comparison; Wu Mei Wan).