1、 Pharmacopoeia standard of Pinellia ternata
This product is processed from Pinellia ternata.
[preparation] take Pinellia ternata, separate its size, soak it in water until there is no dry heart, and take it out; In addition, take an appropriate amount of licorice, add water to decoct twice, combine the decoction, pour into the lime liquid made of an appropriate amount of water, mix well, add the above soaked Pinellia ternata, soak, mix 1-2 times a day, and keep the pH value of the infusion above 12, until the profile is yellow and uniform, and when the mouth tastes slightly numb, take it out, wash it, dry it in the shade or dry it.
For every 100kg of pure Pinellia ternata, 15kg of liquorice and 10kg of quicklime are used.
[properties] the product is quasi spherical or broken into irregular particles. The surface is yellowish white, yellow or brownish yellow. The texture is relatively brittle or hard, with yellow or light yellow section, and the particles are slightly hard and brittle. It has slight air, mild taste, slightly sweet taste, and slight tingling tongue.
[identification] (1) the powder of this product is light yellow to yellow. According to the [identification] (1) test under Pinellia ternata, the same results were obtained.
(2) Take 2G of this product powder, add 2ml hydrochloric acid and 20ml trichloromethane, heat and reflux for 1 hour, cool it, filter it, evaporate the filtrate to dryness, and add 0.5ml absolute ethanol to dissolve the residue as the test solution. . Then take glycyrrhetinic acid reference substance and add absolute ethanol to make a solution containing 1mg per 1ml as the reference substance solution. According to the thin-layer chromatography (general rule 0502), suck 5 µ l of the test solution, 2 µ l of the control solution and 5 µ l of the control solution, respectively, and dot them on the same silica gel gf254 thin-layer plate, using petroleum ether (30 ～ 60 ℃) - ethyl acetate acetone Formic acid (30:6:5:0.5) as the developing agent, develop, take out, dry, and view under the UV light (254nm). In the chromatogram of the test sample, spots with the same color appear at the corresponding positions of the chromatogram of the control medicinal material and the chromatogram of the control sample.
[inspection] the moisture content shall not exceed 13.0% (the second method of general rule 0832).
The total ash content shall not exceed 9.0% (general rule 2302).
[extract] determined according to the cold leaching method under the determination method of water-soluble extract (general rule 2201), it shall not be less than 5.0%.
[nature, taste and meridian tropism] pungent, warm. Return to spleen, stomach and lung meridians.
[functions and indications] drying dampness and resolving phlegm. It is used for cough and asthma due to excessive phlegm, dizziness due to phlegm, wind phlegm dizziness, and headache due to phlegm syncope.
[usage and dosage] 3 ~ 9g.
[note] it should not be used with Aconitum carmichaeli, Radix Aconiti carmichaeli, Radix Aconiti carmichaeli, Radix Aconiti carmichaeli and aconite.
[storage] the same as Pinellia ternata.

2、 Chemical constituents of Pinellia ternata

containβ - sitosterolβ - sitosteryl-d-glucoside, homogenic acid, andL-aspartic acid , GuAminoacid、L-arginine、 Amino acids such as β - aminobutyric acid. It also contains cholineProtocatechuic aldehyde, trace volatile oil and trace ephedrine (0.002%). Protocatechualdehyde is a pungent and irritating substance of Pinellia ternata.  

3、 Pharmacological action of Pinellia ternata

Pinellia ternata, also known as FA Xia, Huang FA Xia, Jing FA Xia, Jing Xia, Jing ban Xia. For raw pinellia, it is processed with alum, licorice and lime and then used as medicine. It has low toxicity and strong expectorant effect. .