Extractum Krameriae Fluidum (U. S. P.)—Fluid Extract of Krameria.
SYNONYM: Fluid extract of rhatany.
Preparation.—"Krameria, in No. 30 powder, one thousand grammes (1000 Gm.) [2 lbs. av., 3 ozs., 120 grs.]; glycerin, one hundred cubic centimeters (100 Cc.) [3 fl℥, 183♏]; diluted alcohol, a sufficient quantity to make one thousand cubic centimeters (1000 Cc.) [33 fl℥, 391♏]. Mix the glycerin with nine hundred cubic centimeters (900 Cc.) [30 fl℥, 208♏] of diluted alcohol, and, having moistened the powder with four hundred cubic centimeters (400 Cc.) [13 fl℥, 252♏] of the mixture, pack it firmly in a cylindrical glass percolator; then add enough menstruum to saturate the powder and leave a stratum above it. When the liquid begins to drop from the percolator, close the lower orifice, and, having closely covered the percolator, macerate for 48 hours. Then allow the percolation to proceed, gradually adding, first, the remainder of the menstruum, and afterwards diluted alcohol, until the krameria is exhausted. Reserve the first seven hundred cubic centimeters (700 Cc.) [23 fl℥, 321♏] of the percolate, and evaporate the remainder to a soft extract; dissolve this in the reserved portion, and add enough diluted alcohol to make the fluid extract measure one thousand cubic centimeters (1000 Cc.) 33 fl℥, 391♏]"—(U. S. P.).
Description, Medical Uses, and Dosage.—(See Krameria). A deep brown-red, decidedly astringent fluid. It may be used where the amount of alcohol contained in the tincture is objectionable, and besides, possesses greater astringency than the latter preparation. It is prone to disintegrate, behaving like other red-tannate fluids (see Fluid Extract of Gossypium). Dose, 10 to 60 minims.