Radix Angelicae
Dahuricae
Source
Root of Angelica dahurica (Fisch. ex Hoffm.) Benth.et Hook. f. and A.
dahurica
(Fisch.ex Hoffm.) Benth. et Hook.f. var. forrnosana (Boiss.) Shan et Yuan,
family Umbelliferae.
Characteristics
Root conical, with basal scar of the stem at the top and large longitudinal
long protruded lenticels scattered on the surface. Cross section white
and powdery, with brown oil spots, cambium rounded. Aromatic in odour.
Taiwan Angelica square at the upper part of the root, lenticels arranged
in four longitudinal rows, square cambium present at the upper part. Acrid
in taste, warm in nature, and attributive to lung and stomach channels.
Indication
I. Expel wind evil and induce sweating to expel the exogenous evils from
the body surface, clear the nasal passage and alleviate pain: For 
common
cold of wind-cold type with stuffy nose and headache; sinusitis and toothache.
2. Relieve carbuncle and drain pus: For the initial stage of carbuncle.
3. Deprive the evil dampness from the middle-jiao: For leukorrhagia of
cold dampness type and prurigo of wind dampness type.
Pharmacological
Action
1. Byak-angelicin contained in its root can dilate the coronary arteries.
2. Stimulating the respiratory center, vasomotor center and nervus vagus.
3. Its decoction exerts bacteriostatic effect.
4. Imperatorin, another active component, is effective for psoriasis.
Administration Decoction: 3-10g.