Daurian Rhododendron Oil

Chinese
满山红油
Pinyin
Man Shan Hong You
Latin
Oleum Rhododendri Daurici
Scientific specimen plate of Daurian Rhododendron Oil, Oleum Rhododendri Daurici, showing amber volatile oil, source leaves, and diagnostic preparation details.
Botanical plate by Kodi .

Known in TCM as Man Shan Hong You (满山红油), this acrid, cool herb enters the Lung. Traditionally, it stops cough and transforms phlegm - Man Shan Hong You is the concentrated volatile-oil preparation made from Man Shan Hong leaves and is used for productive cough with bronchial irritation, most often applied for bronchitis, productive cough, and phlegm accumulation. Modern research has identified Volatile among its active constituents.

Part used: Oil

Also Known As

Rhododendri

Latin: Oleum Rhododendri Daurici | Pinyin: Man Shan Hong You | Chinese: 满山红油

TCM Properties

Taste
acrid
Temperature
cool
Channels
Lung

Traditional Use

Primary Actions

  • Stops cough and transforms phlegm - Man Shan Hong You is the concentrated volatile-oil preparation made from Man Shan Hong leaves and is used for productive cough with bronchial irritation.
  • Benefits acute and chronic bronchitis - modern Chinese materia medica and pharmacopoeial use centers on bronchitic cough rather than on broad general herbal indications.
  • Opens constrained Lung Qi - the penetrating aromatic oil is used when sticky phlegm and cough obstruction are difficult to clear with milder preparations.

Secondary Actions

  • This record represents the distilled oil, not the crude leaf, so it belongs more to a standardized medicinal preparation tradition than to ordinary decoction use.
  • Compared with the leaf, Man Shan Hong You is narrower in indication but more concentrated in delivery.

Classic Formulas

  • Man Shan Hong You capsules or pills - the standard finished-product form for acute and chronic bronchitic cough.
  • Man Shan Hong You derived from steam-distilled leaf preparations - a preparation-based respiratory approach rather than a broad classical decoction tradition.
  • Adjunct use with the crude Man Shan Hong leaf tradition - the oil preparation preserves the same cough-phlegm treatment direction in more concentrated form.

Classical References

  • Chinese pharmacopoeial usage describes Man Shan Hong You as the volatile oil obtained by steam distillation of Rhododendron dauricum leaves and used for cough and expectoration.
  • The preparation is aimed mainly at acute and chronic bronchitis rather than at the wider folk indications sometimes attached to the leaf herb itself.
  • PREPARATION NOTE: this file intentionally distinguishes the oil from herb #303 because the distilled oil is a separate medicinal product with a narrower respiratory focus.

Modern Research

Active Compounds

  • Volatile terpene-rich essential-oil fraction - the defining medicinal portion of Man Shan Hong You
  • Aromatic monoterpene and sesquiterpene constituents - the main class of compounds expected in the distilled oil
  • Leaf-associated flavonoid background chemistry such as farrerol and quercetin - important to the broader Man Shan Hong source literature even when not all are carried into the oil fraction

Studied Effects

  • Direct PubMed literature on the finished oil preparation is limited, but broader Rhododendron dauricum leaf research supports the antitussive and bronchitis-oriented tradition from which the oil is derived (PMID 36584919).
  • Analytical profiling of Rhododendron dauricum leaves identified multiple bioactive constituents that help explain why concentrated leaf-derived preparations remain in respiratory use (PMID 26154189).
  • The best modern interpretation is that Man Shan Hong You is a focused pharmacopeial respiratory preparation whose practical identity rests more on standardized manufacture and traditional bronchitis use than on large standalone clinical trials.

PubMed References

Safety & Interactions

Contraindications

  • Dry cough from yin deficiency without phlegm
  • Known sensitivity to concentrated aromatic oils

Cautions

  • As a concentrated volatile-oil preparation, Man Shan Hong You is more irritating than the crude leaf and should be used only in standardized medicinal forms.
  • The preparation is intended for productive bronchitic cough and may aggravate dry, depleted, or nonphlegmy respiratory irritation.
  • Improvised essential-oil use from nonstandard sources is not equivalent to medicinal-grade Man Shan Hong You.
  • MSK page not found - drug interaction data not available from Memorial Sloan Kettering integrative medicine database

Conditions

Frequently Asked Questions

What is Daurian Rhododendron Oil used for?

Daurian Rhododendron Oil is traditionally used to Stops cough and transforms phlegm - Man Shan Hong You is the concentrated volatile-oil preparation made from Man Shan Hong leaves and is used for productive cough with bronchial irritation., Benefits acute and chronic bronchitis - modern Chinese materia medica and pharmacopoeial use centers on bronchitic cough rather than on broad general herbal indications., Opens constrained Lung Qi - the penetrating aromatic oil is used when sticky phlegm and cough obstruction are difficult to clear with milder preparations.. Research has investigated its effects on: Direct PubMed literature on the finished oil preparation is limited, but broader Rhododendron dauricum leaf research supports the antitussive and bronchitis-oriented tradition from which the oil is derived (PMID 36584919).; Analytical profiling of Rhododendron dauricum leaves identified multiple bioactive constituents that help explain why concentrated leaf-derived preparations remain in respiratory use (PMID 26154189)..

What are other names for Daurian Rhododendron Oil?

Daurian Rhododendron Oil is also known as Rhododendri. In TCM: 满山红油 (Man Shan Hong You); Oleum Rhododendri Daurici.

Is Daurian Rhododendron Oil safe during pregnancy?

The safety of Daurian Rhododendron Oil during pregnancy has not been established. Consult a qualified healthcare provider before use.

What are the contraindications for Daurian Rhododendron Oil?

Daurian Rhododendron Oil should not be used in: Dry cough from yin deficiency without phlegm; Known sensitivity to concentrated aromatic oils. Consult a qualified practitioner before use.