Extractum Pareirae Fluidum (U. S. P.)—Fluid Extract of Pareira.
Preparation.—"Pareira, in No. 40 powder, one thousand grammes (1000 Gm.) [2 lbs. av., 3 ozs., 120 grs.]; glycerin, one hundred cubic centimeters (100 Cc.) [3 fl℥, 183♏]; alcohol, water, each, a sufficient quantity to make one thousand cubic centimeters (1000 Cc.) [33 fl℥, 391♏]. Mix the glycerin with seven hundred and twenty cubic centimeters (720 Cc.) [24 fl℥, 66♏] of alcohol, and one hundred and eighty cubic centimeters (180 Cc.) [6 fl℥, 42♏] of water, and having moistened the powder with four hundred cubic centimeters (400 Cc.) [13 fl℥, 252♏] of the mixture, pack it firmly in a cylindrical 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 afterward a mixture of alcohol and water, made in the proportion of four hundred cubic centimeters (400 Cc.) [13 fl℥, 252♏] of alcohol, to one hundred cubic centimeters (100 Cc.) [3 fl℥, 183♏] of water, until the pareira is exhausted. Reserve the first eight hundred and fifty cubic centimeters (850 Cc.) [28 fl℥, 356♏] of the percolate. Distill off the alcohol from the remainder by means of a water-bath, and evaporate the residue to a soft extract; dissolve this in the reserved portion, and add enough menstruum to make the fluid extract measure one thousand cubic centimeters (1000 Cc.) [33 fl℥, 391♏]"—(U. S. P.).
Description, Medical Uses, and Dosage.—(See Pareira). This is a brown, bitter fluid. A weaker alcoholic menstruum is said to produce as efficient a product. We question the usefulness of the glycerin. Dose, 15 to 90 minims, largely diluted.