Use with caution. Review interactions and contraindications below.
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