Rhizoma Ligustici
Source
Rhizome of Ligusticum sinense Oliv. or rhizome and root of L jeholense
Nakai et Kitag., family Umbelliferae.
Characteristics
Rhizome
irregularly nodular-cylindrical, with round stem base at the upper end
and scar of fibrous roots at the lower end. L jeholense: irregular masses,
stem base not noticeable, with numerous slender and curved roots. Tissue
thin and loose, with cracks. Acrid in taste, warm in nature, and attributive
to urinary bladder channel.
Indication
Expel cold and induce sweating to expel the exogenous evils from the body
surface, expel wind, eliminate dampness and alleviate pain: For common
cold of wind-cold type, headache of wind-cold or wind-dampness type, especially
for parietal and occipital 
headache,
toothache and arthralgia of wind-cold-dampness type.
Pharmacological
Action
1. Its volatile oil exerts sedative and analgesic effect on central nervous
system.
2. Bacteriostatic effect on pathogenic fungi.
Administration Decoction: 3-10g.