Mu Hu Die (Oroxylum Seeds)

Chinese Herb Actions

Chinese Herb Dosage

• What is the typical dosage of Mu Hu Die?

  A low dose — roughly 1.5–6 g in decoction, with the two standard references differing by a factor of two. Our record carries both figures, and they are reported rather than averaged, because they reflect genuinely different editorial conventions rather than a mistake.

  • 3–6 g in decoction (Chen & Chen).
  • 1.5–3 g in decoction (Bensky, 3rd ed.).
  • Bulk is deceptive. The seeds are thin, dry and papery, so a few grams is a surprisingly large handful by volume. Weigh rather than eyeball.
  • Also taken as an infusion — for throat and voice complaints the seeds are commonly steeped in hot water, sometimes with liquorice or honey, rather than boiled hard.

  Note: the 1.5–3 g and 3–6 g ranges do not overlap at the top and bottom. Both are recorded on our own herb entry and both are reported here; this is a difference of convention between reference works, not a factual conflict about the herb.

  Source: our own dosage record (both recorded ranges, attributed as held); published materia medica consensus. Reference only — not a prescription.

Chinese Herb Contraindications & Cautions

• Are there cautions for Mu Hu Die?

  Use caution where the voice has been lost from an external wind-cold pattern — that is the caution our record carries, and it is the one that matters most. Mu Hu Die is cool and moistening; a cold, acute, exterior presentation calls for the opposite treatment, and a cool moistening seed can hold the pathogen in place.

  • Loss of voice from wind-cold — caution, as recorded on our own entry. The herb suits dry, hot or deficient throat patterns, not a fresh cold.
  • Spleen deficiency with cold, or loose stools — a cool, moistening herb is poorly suited to a cold, weak digestion, particularly over long courses. This follows from the herb’s nature rather than from a recorded contraindication.
  • Not every hoarse voice is a herb problem. Hoarseness lasting more than about three weeks, or accompanied by pain on swallowing, a lump sensation, weight loss, coughing blood or breathing difficulty, needs proper medical assessment rather than a throat remedy. This is general reference information, not treatment advice.
  • Pregnancy and long-term use — confirm with a qualified practitioner. Toxicological study of the seed specifically is thin (see below), so extended daily use is not something the literature can vouch for.

  Source: our own cautions record (wind-cold voice loss); category reasoning per published materia medica consensus, cross-referenced against multiple online sources; the toxicology gap per PMID 25543018. Neutral reference facts, not usage instructions.

Chinese Herb Toxicity & Overdose

• Low at ordinary doses; our record does not flag Mu Hu Die as toxic, and no poisoning reports for the seed were located. It is a mild, low-dose herb, and the traditional literature treats it as unremarkable on safety.

  The honest position on the modern picture is that the seed itself has had little toxicological study. A comprehensive 2015 review of Oroxylum indicum states that, from a toxicity perspective, only aqueous and ethanolic extracts of the stem bark, root bark and fruits had been assessed, and those were found to be safe (PMID 25543018) — the seed is not among the parts named. Separately, a standardised commercial Oroxylum indicum extract fed to mice for four weeks at 500 mg/kg produced no changes in liver histology or in serum ALT, AST, ALP, bilirubin, albumin, globulin or total protein (PMID 34306298, PMC 8297712); that is reassuring for that preparation but it is not the seed as decocted, and a negative four-week rodent study is not a demonstration of long-term human safety.

  Source: our own herb record (not flagged toxic); toxicity-assessment scope per PMID 25543018 / DOI 10.1016/j.jep.2014.12.027; rodent hepatotoxicity screen per PMID 34306298 / PMC 8297712. Reference note, not a safety guarantee.

Herb-Drug Interactions

• No established clinical herb–drug interactions are documented for Mu Hu Die, and no human interaction studies of the seed were located. Two mechanism-level points are recorded for practitioner awareness rather than as warnings. First, the seed’s principal flavonoids include baicalein and baicalin — the same marker compounds as Huang Qin (Scutellaria baicalensis), a much more heavily studied herb; anyone already taking a Scutellaria-based product is therefore taking overlapping chemistry, though at the low doses used for Mu Hu Die this is a theoretical point. Second, a seed-extract flavonoid fraction has been shown in cell and animal work to add to the postprandial glucose-lowering effect of the prescription alpha-glucosidase inhibitor acarbose (PMID 28511342, PMID 28056420); that is preclinical work on a concentrated extract, not the decocted seed, and it is not evidence of a clinical interaction — but it is a reasonable point of awareness for a patient on glucose-lowering medication. (Precautionary and mechanism-based; flagged for practitioner confirmation, not a demonstrated interaction.)

  Source: PMID 28511342 and PMID 28056420 (seed-extract flavonoids with acarbose, in vitro and in mice); flavonoid identity per PMID 22683048 and PMID 27038401. Preclinical context only, not clinical guidance.

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 Mu Hu Die (Oroxylum indicum)?

  Yes — a substantial body of it, but with an important qualification: most of the pharmacology concerns the root and stem bark, or a standardised commercial extract, rather than the seed used as Mu Hu Die. The seed has its own, smaller literature, and there is one small human trial of a preparation containing it for throat pain. The chemistry is the common thread: this is a flavonoid-rich plant, and the seed is one of the richest parts.

  • Chemistry of the seed. The characteristic constituents are flavones and their glycosides — baicalein, baicalin, chrysin, oroxylin A, oroxin A and oroxin B — profiled in the seeds by liquid chromatography–mass spectrometry (PMID 22683048) and with antioxidant flavonoids isolated directly from the seed (PMID 21596112). Baicalein and baicalin are the same markers that define Huang Qin, an entirely unrelated plant — a striking convergence of chemistry across two very different herbs.
  • Quality control. Validated methods exist for the seed material specifically, including a single-reference-standard method for quantifying multiple flavonoid components in Semen Oroxyli (PMID 23076784) and a validated liquid-chromatography assay for routine quality control (PMID 23513953).
  • Pharmacokinetics. A validated liquid chromatography–tandem mass spectrometry method measured four Semen Oroxyli flavonoids — oroxin A, oroxin B, baicalin and chrysin — simultaneously in rat plasma and applied it to a pharmacokinetic study (PMID 27038401). Animal work, but seed-specific.
  • Human evidence, throat. The one clinical study located that bears on the traditional use is a randomised pilot trial of a gargle containing honeysuckle and Semen Oroxyli after uvulopalatopharyngoplasty (a throat operation). Among 218 patients completing assessment, the gargle group had significantly lower resting throat-pain scores at one and two weeks and lower swallowing-pain scores at two weeks, with greater reported comfort; the difference in wound infection and bleeding was not statistically significant (PMID 36324688, PMC 9619035). This is a two-herb topical gargle in a surgical setting — not the herb taken internally for hoarseness — but it is real human data on throat pain, and it points the same way as the tradition.
  • Genus-level review. A 2015 review across all parts of the plant identified around 111 compounds, predominantly flavonoids, naphthalenoids and cyclohexylethanoids, and catalogued antimicrobial, anti-inflammatory, anti-ulcer, hepatoprotective, antidiabetic, antidiarrhoeal and antioxidant activities in cell and animal models. It concludes that pharmacological results support some traditional uses and calls for mechanism, toxicity and clinical work (PMID 25543018).
  • Seed-specific preclinical work — seed extract showed antidepressant-like effects in a mouse chronic-mild-stress model (PMID 38004136), suppressed proliferation and migration in cervical cancer cell lines (PMID 35642412), and prevented steatosis markers in a cell model of fatty liver (PMID 33640247). Early-stage laboratory research only, and none of it bears on the traditional throat indication.
  • What the standardised extract is not. A 12-week randomised, double-blind, placebo-controlled trial of a commercial standardised Oroxylum indicum extract in 82 adults with self-reported mild cognitive impairment reported effects on cognitive measures (PMID 34531736). That product is a concentrated, baicalein-standardised extract of another plant part, developed and sold as a nootropic supplement. Its results say nothing about Mu Hu Die decocted for a hoarse voice, and the two should not be read across — the same distinction this site drew for the licensed mulberry-twig alkaloid tablet and for standardised andrographis extracts.

  Bottom line: the seed’s flavonoid chemistry is well characterised and its anti-inflammatory and antioxidant activity is consistent in preclinical models; the single relevant human study is a small trial of a topical gargle. There are no clinical trials of Mu Hu Die alone for cough, hoarseness or voice loss.

  Sources: PMID 25543018 / DOI 10.1016/j.jep.2014.12.027 (comprehensive review of Oroxylum indicum); PMID 22683048 and PMID 21596112 (seed flavonoid profiling and isolation); PMID 23076784 and PMID 23513953 (quality control of Semen Oroxyli); PMID 27038401 / DOI 10.1016/j.jchromb.2016.03.030 (pharmacokinetics of four seed flavonoids in rat plasma); PMID 36324688 / PMC 9619035 / DOI 10.3389/fphar.2022.974233 (randomised pilot trial of a honeysuckle and Semen Oroxyli gargle after throat surgery); PMID 38004136, PMID 35642412, PMID 33640247 (seed-extract preclinical studies); PMID 33276419 (review of baicalein from Oroxylum indicum); PMID 34531736 / DOI 10.3389/fnagi.2021.728360 (standardised commercial extract, cognitive trial — different preparation and plant part). Research context, not a therapeutic claim.

Chinese Herb Notes

• Why is Mu Hu Die called “wood butterfly”?

  Because of what the seeds look like: large, flat, papery discs with a broad translucent wing all the way round, so that a scattered handful looks like a drift of pale moths or butterflies. They come from Oroxylum indicum, a tropical Asian tree with enormous sabre-shaped pods — often close to a metre long — that hang from bare branches and split open to release hundreds of these winged seeds, which the wind carries a long way. The wing is a dispersal structure; it is also most of the seed by area, which is why a few grams looks like so much. The English names sometimes given to the tree, such as “Indian trumpet tree,” refer to the flowers rather than the seeds.

  How is Mu Hu Die different from Pang Da Hai?

  They are the two throat-and-voice seeds, and the difference is dryness versus bulk. Both are used for a hot, dry throat with hoarseness or lost voice; they are not the same tool.

  • Mu Hu Die (Oroxyli Semen) — sweet, bland and cool; Liver and Lung channels; classed with the cough-and-wheezing herbs. A thin, papery, light seed, dosed by the gram at 1.5–6 g. Adds the Liver-soothing, qi-regulating action, which Pang Da Hai does not have. The choice when hoarseness sits alongside cough, or alongside tension and flank discomfort.
  • Pang Da Hai (Sterculiae lychnophorae Semen) — sweet and cold; Lung and Large Intestine channels; classed with the herbs that cool and transform phlegm-heat. A large, dense seed dosed by count (2–5 seeds), which swells into a spongy mucilaginous mass in water. It also moistens the intestines and moves the bowels — a real difference in effect, not a footnote. The choice when the dry throat comes with constipation, or when a mucilaginous coating is what is wanted.
  • In short: Pang Da Hai coats and lubricates and loosens the bowel; Mu Hu Die moistens, quiets cough and also moves Liver qi. Pang Da Hai is colder; Mu Hu Die is milder and more versatile.

  Other throat herbs in our records for orientation: Jie Geng (Platycodon root) opens and lifts Lung qi and expels phlegm from the throat; She Gan (Belamcanda rhizome) is bitter and cold and directed at throat swelling with phlegm-heat; Niu Bang Zi (burdock fruit) releases the exterior as well as benefiting the throat, for an active wind-heat presentation.

  Which formulas contain Mu Hu Die?

  None in our own formula records. No formula is named here rather than guessed at. In practice the herb is typically added to throat and voice prescriptions rather than being a fixed ingredient of a classical formula, which is consistent with that absence. (Traditional context, not treatment advice.)

  Source: our own herb records (Mu Hu Die, Pang Da Hai, Jie Geng, She Gan, Niu Bang Zi) and our own formula records; botanical description and traditional uses per PMID 25543018 / DOI 10.1016/j.jep.2014.12.027, cross-referenced against multiple online sources. Traditional context, not treatment advice.