Mo Yao (Myrrh)

Chinese Herb Actions

Chinese Herb Dosage

• What is the typical dosage of Mo Yao?

  Roughly 3–10 g in decoction — sources give a slightly narrower range of 3–9 g (Bensky) up to 3–10 g (Chen & Chen), reflecting normal materia medica variation rather than a real discrepancy. Mo Yao is a resin and is often prepared stir-fried (processed to reduce its raw resinous irritancy) before being added to decoctions or pills, and is also used topically in powders/plasters for trauma and sores.

  Source: Sacred Lotus sources & references; cross-referenced against multiple online sources and standard materia medica ranges. Reference only — not a prescription.

Chinese Herb Combinations:

Chinese Herb Contraindications & Cautions

• Are there cautions for Mo Yao?

  Mo Yao is contraindicated during pregnancy because its blood-breaking, stasis-moving action is traditionally considered risky for a developing pregnancy. It is also a known stomach irritant: patients with a weak stomach may experience nausea or vomiting, so it should be used cautiously (often with food or Stomach-protective herbs) in those with sensitive digestion. It is not intended for long-term use, and is not appropriate for patients who do not have an actual blood-stasis pattern.

  • Pregnancy — avoid; blood-invigorating/stasis-breaking herbs are classically contraindicated in pregnancy.
  • Weak stomach — may cause nausea or vomiting; use cautiously.
  • Not for long-term use, and not for patients without a genuine stasis pattern.

  Source: Sacred Lotus sources & references; cross-referenced against multiple online sources and materia medica consensus. Traditional-use framing; not medical advice.

Chinese Herb Toxicity & Overdose

• Low systemic toxicity, but a well-documented gastrointestinal irritant. Mo Yao’s main real-world safety issue at commonly used doses is stomach upset (nausea, vomiting) in sensitive individuals rather than organ toxicity; this is consistent with its traditional caution for patients with weak digestion. As above, it also carries a traditional pregnancy contraindication.

  Source: materia medica consensus; cross-referenced against multiple online sources. Reference note, not a safety guarantee.

Herb-Drug Interactions

• No well-established clinical herb–drug interactions are documented. Given Mo Yao’s traditional blood-moving action, precautionary awareness is reasonable for patients on anticoagulant or antiplatelet therapy, or those with bleeding disorders — this reflects the herb’s traditional function, not a demonstrated clinical interaction. (Flagged for practitioner confirmation.)

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 Mo Yao (Commiphora myrrha)?

  Yes — multiple animal and laboratory studies support anti-inflammatory, analgesic, and wound-related activity, consistent with traditional use, though we could not verify large human clinical trials. Myrrh resin contains terpenoids (mono-, sesqui-, di-, and triterpenoids), steroids, and volatile essential oils.

  • Anti-inflammatory / analgesic (animal models) — ethanol extracts of Commiphora myrrha reduced inflammation and pain behavior in mouse paw-edema and pain models, supporting the traditional swelling/pain-relieving use.
  • Combined with frankincense (Boswellia carterii) — a comparative animal study found the combined myrrh + frankincense extract gave stronger suppression of paw edema than either herb alone at certain time points, while myrrh alone showed the strongest pain-relief effect in an oxytocin-induced dysmenorrhea model — a modern echo of the classic Mo Yao–Ru Xiang pairing. Animal research, not clinical proof of the pair’s effect in humans.
  • Neuropathic pain (animal model) — an aqueous myrrh extract reduced paclitaxel (chemotherapy)-induced neuropathic pain in mice, with proposed mechanisms including TRPV1 receptor inhibition and antioxidant effects. Preclinical only.
  • Broad pharmacology review — a 2023 review summarizes anti-inflammatory, antioxidant, antimicrobial, neuroprotective, and analgesic activities across myrrh’s phytochemical constituents, while noting that clarifying herb–drug interactions remains an open need.

  Overall, the modern evidence for Mo Yao is preclinical (cell and animal models); it supports plausibility for the traditional pain/swelling/wound-healing uses but does not by itself establish efficacy in humans.

  Sources: PMID 21167270 (anti-inflammatory/analgesic extract study); PMID 22178177 (Journal of Ethnopharmacology, 2012 — myrrh + frankincense combined extract, animal models); PMID 38186647 (Frontiers in Pharmacology, 2023 — paclitaxel-induced neuropathic pain, mouse model); PMID 36399185 (Naunyn-Schmiedeberg's Archives of Pharmacology, 2023 — phytochemical/pharmacological review). Research context, not a therapeutic claim.

Chinese Herb Notes

• Why is Mo Yao paired with Ru Xiang, and what formulas contain it?

  Mo Yao is almost always combined with Ru Xiang (Frankincense) as a classic blood-moving, pain-relieving pair — the two resins are considered mutually reinforcing: Ru Xiang is said to emphasize moving qi and blood together with a stronger effect on generating new tissue/flesh, while Mo Yao is considered somewhat stronger for breaking blood stasis specifically; used together they are a mainstay of formulas for traumatic injury, sores, and painful stagnation.

  • Die Da Wan — a classic trauma/“hit-fall” formula for bruising, swelling, and pain after injury.
  • Qi Li San — another trauma formula for acute injury with pain, swelling, and bleeding.
  • Xian Fang Huo Ming Yin — a formula for early-stage sores/abscesses (yang-type toxic swellings).
  • Huo Luo Xiao Ling Dan and Xiao Huo Luo Dan — formulas for chronic painful obstruction (Bi Zheng) with blood stasis in the channels and collaterals.
  • Zhen Ling Dan — another blood-stasis pain formula.

  Source: Sacred Lotus sources & references (formula links); cross-referenced against multiple online sources and materia medica consensus on the Mo Yao–Ru Xiang pair. Traditional formula context, not treatment advice.