Radix Poranae Mairei
Aliases：Small-Sepal Porana.
Hongshu Xixin (Mairei Porana) is the name of a traditional Chinese medicine. It is the root of Porana mairei Gagn. et Courch., a plant in the family Convolvulaceae. It grows in open forests or by ravine edges at elevations of 1,600–2,500 meters. It was first recorded in the Flora Reipublicae Popularis Sinicae and is also documented in Chinese Materia Medica (Zhonghua Bencao), Xinhua Materia Medica Outline (Xinhua Bencao Gangyao), and other herbal works.
Efficacy & Actions
Warms the Lungs, relieves cough, and calms asthma.
Indications
Used for cough and whooping cough (pertussis).
Modern Pharmacology
Modern pharmacological research on Mairei Porana remains insufficient. Available data only record that its root contains lysergol, a constituent that provides the pharmacological basis for antitussive and antiasthmatic activity. Chemical studies on plants of the genus Porana show that the genus contains organic acids, coumarins, flavonoids, sterols, and other compounds. However, dedicated systematic pharmacological research on Mairei Porana (P. mairei) remains to be further conducted. Traditional actions and indications should remain the primary basis for use.
Ingredients
The root of Mairei Porana mainly contains the following constituents: Glucose. Lysergol: an ergot alkaloid constituent that provides the material basis for its antitussive and antiasthmatic activity. Note: Systematic chemical studies on Mairei Porana remain insufficient. Plants of the genus Porana contain various compounds such as chlorogenic acids, coumarins, amides, steroids, and flavonoids, but dedicated chemical studies on Mairei Porana are extremely limited.
Usage & Dosage
Oral use: Decocted in water, 3–5 g.
Contraindications
Pregnant and breastfeeding women should use this product under the guidance of a physician. It should not be taken in excessive doses.
Medicinal Parts
Root.
Selection & Storage
Dried material should be stored in a well-ventilated, dry place. Protect from moisture and insect damage. Airtight storage is recommended. Avoid direct sunlight.
