Extractum Lobeliae Fluidum Compositum.—Compound Fluid Extract of Lobelia.
Preparation.—Take of recently dried bloodroot, skunk-cabbage root, and lobelia seed and leaves, each, coarsely powdered, 4 troy ounces; alcohol, diluted alcohol, each, a sufficient quantity. Moisten the powders mixed together, with sufficient alcohol, and let them stand for 24 hours; then transfer the mixture to a percolator, and gradually add alcohol, returning a little of the first that passes, until it runs clear. Reserve, by itself, of the first or strongest percolate, 12 fluid ounces; then pour diluted alcohol on the residuum in the percolator, until the liquid that comes through has very little of the color or taste of the medicine; evaporate this latter solution to 4 fluid ounces by a heat considerably below the boiling point, and while warm mix in the reserved tincture, and make 1 pint of fluid extract.
Medical Uses and Dosage.—This fluid extract is emetic, expectorant, and antispasmodic, and may be used as a substitute for the acetated tincture of bloodroot; A fluid drachm of the extract is equivalent to about 1 drachm of the powder; the dose is from 10 to 60 minims, according to the desired effect (E. S. Wayne).