Zi Zhu (Callicarpa Leaf)

Chinese Herb Actions

Chinese Herb Dosage

• What is the typical dosage of Zi Zhu?

  9–15 g in decoction is the standard range (some references cite up to 20 g). The fresh herb may be used at a much larger 30–60 g, and as a powder the dose is 1.5–3 g. For topical use, the fresh leaf is crushed and pressed onto the wound, or the dried leaf is ground to a powder and sprinkled on or pounded into the affected area — the amount is as needed rather than a fixed dose.

  Source: multiple online sources (herb databases). Reference ranges only — not a prescription.

Chinese Herb Contraindications & Cautions

• Are there cautions for Zi Zhu?

  Zi Zhu is traditionally used with caution for bleeding due to cold from deficiency. Because it is a cool, astringent herb, it is not well suited on its own to bleeding rooted in yang/cold-deficiency patterns, and is combined with warming herbs when that pattern is present.

  Source: multiple online sources.

Chinese Herb Toxicity & Overdose

• Low. Zi Zhu is not classified among the toxic or restricted herbs in the reviewed sources, and no significant toxicity is reported at customary internal or topical doses. It has a long history of both decoction and direct topical (crushed-leaf) use for wounds and burns. No dedicated human toxicology study was identified; treat this as a general reference note, not a safety guarantee.

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

Herb-Drug Interactions

• No well-established clinical herb–drug interactions are documented. Preclinical work on Callicarpa nudiflora has isolated compounds that promote clotting (activating the intrinsic coagulation pathway) alongside separate triterpenoid compounds that instead inhibit platelet aggregation — a genuine complexity in the laboratory findings, involving different isolated constituents and test models, not a contradiction of Zi Zhu’s traditional hemostatic use. Given these mixed procoagulant/antiplatelet preclinical signals, practitioner awareness is reasonable for patients on anticoagulant or antiplatelet therapy. (Flagged for practitioner confirmation — absence of documented clinical 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 Zi Zhu (Callicarpa)?

  Yes — preclinical (in vitro/animal) research on Callicarpa nudiflora, the species most studied under the Zi Zhu name, supports its traditional hemostatic, wound-healing, and toxin-resolving/antibacterial uses, though no human clinical trials were identified.

  • Hemostatic chemistry — researchers isolated eleven compounds from C. nudiflora and found several altered clotting parameters (activated partial thromboplastin time, fibrinogen) in rabbit blood in vitro, consistent with activation of the intrinsic coagulation pathway.
  • Antiplatelet compounds — a separate study isolated two novel triterpenoids from C. nudiflora leaves that inhibited ADP-induced platelet aggregation in vitro (EC50 ≈ 9.5 and 25.3 µM) — a different, complementary mechanism from the pro-coagulant compounds above.
  • Burn/wound healing — a topical C. nudiflora extract, tested in a rat second-degree scald-wound model, produced faster healing and lower expression of scarring-related fibrotic markers than untreated or Vaseline-only controls over 21 days — consistent with the traditional topical use for burns.
  • Antibacterial and broader pharmacology — review articles summarize antibacterial, anti-inflammatory, antiviral, and antioxidant activities reported across Callicarpa species, aligned with the traditional “resolves toxin” framing for sores and infected wounds.

  Note: The cited research is predominantly on Callicarpa nudiflora (large-leaved beautyberry); this site’s own record Latin “Folium Callicarpae” is genus-level and does not specify a species. Different regional Chinese/Taiwanese pharmacopeias trade several Callicarpa species’ leaves (including C. nudiflora and C. formosana) under the Zi Zhu name; we treat the cited pharmacology as reasonably representative of the traded herb, not a species-exact match.

  Sources: PMID 21438394 (Zhongguo Zhong Yao Za Zhi 2010, hemostatic constituents); PMID 23669034, DOI 10.1016/j.fitote.2013.05.007 (Fitoterapia 2013, antiplatelet triterpenoids); PMID 31186655, DOI 10.1155/2019/1860680 (Evid Based Complement Alternat Med 2019, scald-wound healing); PMID 32783986, DOI 10.1016/j.jep.2020.113123 (J Ethnopharmacol 2020, phytochemistry/pharmacology review); PMID 23313870, DOI 10.1016/j.jep.2012.12.051 (J Ethnopharmacol 2013, genus review). Research context, not a therapeutic claim.

Chinese Herb Notes

• How does Zi Zhu compare with other herbs that stop bleeding, like Bai Ji and Xian He Cao?

  Among the astringent hemostatics, Zi Zhu is considered the mildest of the three — Bai Ji is the strongest, Xian He Cao intermediate, and Zi Zhu the weakest for arresting bleeding on its own. What sets Zi Zhu apart is its heat-clearing, toxin-resolving action and its dedicated topical use for burns, sores, and traumatic wounds.

  • vs Bai Ji — Bai Ji is the strongest of the three astringent hemostatics, favored for Lung and Stomach bleeding (including peptic ulcer) and for sores.
  • vs Xian He Cao — Xian He Cao is broader-spectrum, suited to bleeding of any temperature or pattern, and also checks chronic diarrhea; Zi Zhu is milder as a hemostatic but adds the toxin-resolving, topical-burn use that Xian He Cao lacks.

  Common combinations (per materia medica sources): with Xian He Cao and Han Lian Cao (Ecliptae) for vomiting of blood and nosebleed; with Huang Lian and Huang Bai for heat-pattern bleeding; with Jin Yin Hua (Honeysuckle) for toxic sores. (Traditional formula context, not treatment advice.)

  Note: This site’s own record records Zi Zhu’s channels as Liver, Lung, and Spleen. Several Bensky-derived English references (and Bensky’s Chinese Herbal Medicine: Materia Medica, 3rd ed., per secondary citation) instead list Liver, Lung, and Stomach. We believe this is the same herb with a channel-entry variance between source traditions; this site’s Spleen designation is left unchanged pending owner review.

  Source: multiple online sources.