White mustard seed (Baijiezi)
Sinapis alba (L.) Boiss. (Fam. Brassicaceae)
Pharmaceutical Name: Semen Sinapsis seu
Brassicae
Botanical
Name: 1. Sinapis alba (L.) Boiss.
(Fam. Brassicaceae); 2. Brassica Juncea (L.) Czern. et Coss. (Fam. Brassicaceae)
Common Name: Brassica seed, White
mustard seed.
Source of Earliest Record: Mingyi Bielu.
Part Used & Method for Pharmaceutical
Preparations: After the white mustard ripens in summer or autumn, the seeds
are gathered and dried in the sun.
Properties & Taste: Pungent and
warm.
Meridian: Lung.
Functions: 1. To warm the lungs and
resolve phlegm; 2. To invigorate qi circulation and disperse nodules; 3. To
open the channels and stop pain.
Indications & Combinations:
1. Lungs blocked by cold-phlegm manifested
as cough with profuse, dilute and white sputum and stifling sensation in the
chest. White mustard seed (Baijiezi) is used with Perilla seed (Suzi) and
Radish seed (Laifuzi) in the formula Sanzi Yangqing Tang.
3. Channels and collaterals obstructed by
phlegm-damp manifested as joint pain and numbness of the limbs. White
mustard seed (Baijiezi) is used with Myrrh (Moyao) and Costus root (Muxiang).
2. Retention of phlegm-damp in the chest and
diaphragm manifested as distension and pain in the chest and hypochondriac
region. White mustard seed (Baijiezi) is used with Kansui root (Gansui) and
Peking spurge root (Daji).
4. Yin carbuncles and swellings without
discoloration of the skin. White mustard seed (Baijiezi) is used with Cinnamon
bark (Rougui), Antler glue (Lujiaojiao) and Prepared rehmannia root
(Shudihuang) in the formula Yanghe Tang.
Dosage: 3-10
g, decocted in water for an oral dose. Appropriate amount for external use.
Cautions &
Contraindications: Since Semen Sinapis encourages the formation of blisters
on the skin, it is contraindicated in patients with skin allergies.
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