Goldenseal consists of the dried rhizome and roots of Hydrastis canadensis L. [Fam. Ranunculaceae].
Contains isoquinoline alkaloids, principally, hydrastine, berberine, and canadine.
Unless otherwise recommended
Three times daily: Dried rhizome and root: 0.5g to 1g. Tincture (1:10, 60% ethanol): 2ml. to 4ml. Liquid extract (1:1, 60% ethanol): 0.3ml. to 1ml.