Root of Dichroa febrifuga Lour., family Hydrangeaceae.
woody, conical, twisted and branching, 9-15 cm long and axial root 0.5-2.0
cm in diameter. Surface cork yellow, longitudinally and finely striated,
easily peeling off. Prepared by crosscutting, section yellow-white, showing
radial vascular bundles. Bitter in taste, slightly cold in nature, slightly
toxic, and attributive to lung and liver channels.
1. Prevent recurrence of malaria: For malaria, usually used with Semem
Arecae together to minimize its emetic effect.
2. Induce vomiting of phlegm: For accumulation of phlegm in the chest.
A, B and Y-Dichroine are three active components.
All of them are antimalarial agents. Y-Dichroine being the most effective.
2. B-Dichroine is also an amebicide which is stronger than emetine.
3. A and B-Dichroine can reduce vaccine-induced fever in rabbits.
4. The three components are hypotensives, vasodilators and cardio-inhibitors.
This herb has an emetic effect and is contraindicated for the aged, the
debilitated, pregnant women and those with relevant disorders.