Pinellia tuber (Banxia)
Pinellia ternata (Thunb.) Breit. (Fam. Araceae)
Pharmaceutical Name: Rhizoma Pinelliae
Botanical Name: Pinellia
ternata (Thunb.) Breit. (Fam. Araceae)
Common Name: Pinellia tuber
Source of Earliest Record: Shennong
Bencao Jing.
Part Used & Method for Pharmaceutical
Preparations:
Dried
tuber.
Rhizoma
Pinelliae is produced in most parts of China. The tuber, which is collected in
summer and autumn, is cleaned, dried in sunlight, and sliced. It is used
unprocessed, or it can be processed with ginger and alum to form Fa Ban Xia.
Properties & Taste: Pungent, warm
and toxic.
Meridians: Spleen, stomach and lung.
Functions: 1. To dry dampness and
resolve phlegm; 2. To conduct rebellious qi downward and stop vomiting; 3. To
reduce distension and disperse nodules
Indications & Combinations:
1. Phlegm-damp cough due to deficient spleen
manifested as cough with profuse, dilute and white sputum. Pinellia tuber
(Banxia) is used with Tangerine peel (Chenpi) and Poria (Fuling) in the formula
Erchen Tang.
2. Nausea and vomiting due to rebellious
stomach qi: a) stomach cold typePinellia tuber (Banxia) is used with Fresh
ginger (Shengjiang) in the formula Xiao Banxia Tang; b) stomach heat
typePinellia tuber (Banxia) is used with Bamboo shavings (Zhuru) and Loquat
leaf (Pipaye); c) pregnancy typePinellia tuber (Banxia) is used with Perilla
stem (Sugeng) and Amomum fruit (Sharen); d) stomach weakness typePinellia tuber
(Banxia) is used with Ginseng (Renshen) and Jujube (Dazao).
3. Globus hystericus due to qi stagnation
and accumulation of phlegm-damp manifested as a feeling of having a foreign
body in the throat, fullness and distension in the chest and epigastric region
and nausea. Pinellia tuber (Banxia) is used with Magnolia bark (Houpo),
Perilla leaf (Zisuye) and Poria (Fuling) in the formula Banxia Houpo Tang.
4. Goiter, scrofula and subcutaneous nodule.
Pinellia tuber (Banxia) is used with Laminaria (Kunbu), Seaweed (Haizao) and
Tendrilled fritillary bulb (Chuanbeimu).
Dosage: 5-10 g, decocted in water for
an oral dose. Appropriate amount for external use.
Cautions & Contraindications: This
herb is contraindicated in cases with dry cough due to deficient yin, or cough
due to phlegm-heat. Also, it cannot be used together with the herb Sichuan
aconite root (Wutou).
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