Extractum Lappae.—Extract of Lappa.
SYNONYM: Extract of burdock.
Preparation.—Exhaust burdock root, coarsely powdered, or in pieces, with water, a sufficient quantity, proceeding in the same manner as explained for the preparation of Aqueous Extracts, on page 758.
Medical Uses and Dosage.—Extract of burdock is principally used as an alterative, in scrofula, syphilis, cutaneous affections, etc. Dose, from 5 to 20 grains, 3 times a day.