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Can Rhododendron be used to stop coughing and dispel phlegm?


Rhododendron has a pungent, bitter and cold taste, and has the effect of relieving cough and eliminating phlegm. The preparations made from Rhododendron mainly include compound Rhododendron syrup, zhikechuan granules, compound Rhododendron capsule, compound Rhododendron tablet, etc.

The main compounds extracted from Rhododendron are as follows:

1. flavonoids

Farrerol and quercetin the extract of Rhododendron are the main components of expectorant, antitussive and antiasthmatic. Farrerol is a yellow crystalline powder, odorless and tasteless. Quercetin is a yellow needle crystal

2. Volatile oil

germacrone, juniper, menthol and three kinds of eucalyptol, 4-phenyl-2-butanone, buergone, β - panassinene, valencene, and caryophyllene were found in the extract.

3. Coumarins

Two coumarins, scopolamine and umbrella lactone, were isolated from the extract of Rhododendron by silica gel or alumina column chromatography

4. Phenolic acids

There are vanillic acid, p-hydroxybenzoic acid, gallic acid, protocatechuic acid, Syringate, Rhododendron alcohol, etc.

5. Other ingredients

There are betulin, ursolic acid and so on in the extract.

Rhododendron extract, which mainly contains flavonoids and volatile oil, is the main component in the treatment of cough, asthma and chronic bronchitis.