Extractum Uvae Ursi Fluidum (U. S. P.)—Fluid Extract of Uva Ursi.
Preparation.—"Uva ursi, in No. 30 powder, one thousand grammes (1000 Gm.) [2 lbs. av., 3 ozs., 120 grs.]; glycerin, three hundred cubic centimeters (300 Cc.) [10 fl℥, 69♏]; alcohol, water, each, a sufficient quantity to make one thousand cubic centimeters (1000 Cc.) [33 fl℥, 391♏]. Mix the glycerin with two hundred cubic centimeters (200 Cc.) [6 fl℥, 366♏] of alcohol and five hundred cubic centimeters (500 Cc.) [16 fl℥, 435♏] 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 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 afterward a mixture of alcohol and water, made in the proportion of two hundred cubic centimeters,. (200 Cc.) [6 fl℥, 366♏] of alcohol to five hundred cubic centimeters (500 Cc.) [16 fl℥, 435♏] of water, until the uva ursi is exhausted. Reserve the first nine hundred cubic centimeters (900 Cc.) [30 fl℥, 208♏] of the percolate, and evaporate the remainder to a soft extract; dissolve this in the reserved portion, and add enough of the mixture of alcohol and water to make the fluid extract measure one thousand cubic centimeters (1000 Cc.) [33 fl℥, 391♏]"—(U. S. P.).
Description, Medical Uses, and Dosage.—(See Uva Ursi). This is a deep-brown fluid of a sweet-bitterish and astringent taste. This fluid extract may be used wherever uva ursi is indicated, in doses of a fluid drachm. It has been found very useful in irritable conditions of the bladder, associated with 3 to 5 fluid ounces of the fluid extract of lupulin.