Extractum Hydrastis.—Extract of Hydrastis.
Related entry: Hydrastis (U. S. P.)—Hydrastis
SYNONYM: Extract of golden seal.
Preparation.—Mix powdered golden-seal root with enough diluted alcohol to thoroughly moisten it; in 24 hours put the whole into a percolator, and exhaust with diluted alcohol. Distill the alcohol from this filtered tincture, and evaporate the remainder to the consistence of an extract.
Medical Uses and Dosage.—This extract possesses all the tonic virtues of the root, and may be used in all cases where it is indicated. In many instances it will be preferable to the hydrochlorate of berberine, on account of the insolubility of the latter. The dose is from 2 to 5 grains, 3 times a day (J. King).