ABSTRACT
R. tanguticum
Maxim
.,
R. officinale
Baill
.,
Baill
.,
R. coreanum
Nakai
, and
R. undulatum
L.
, and is used in remedies for blood stagnation syndrome (called “
Oketsu syndrome
” in Japanese traditional medicine) as well as a
purgative agent
in Japanese, Korean, and Chinese traditional medicines. Among them, the rhizome of
R. undulatum
, a Korean rhubarb, is considered to have a reduced purgative but more potent effect on Oketsu syndrome than other kinds of rhubarbs.
