Extractum Geranii Fluidum (U. S. P.)—Fluid Extract of Geranium.
Preparation.—"Geranium, 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 three hundred and fifty cubic centimeters (350 Cc.) [11 fl℥, 401♏] of the mixture, pack it firmly in a cylindrical percolator; then add enough of the 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 geranium 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 Geranium). This is a deep reddish-brown fluid, with a powerfully astringent taste and but very little odor. It is subject to gelatinization in common with other preparations containing the so-called "red tannates," and it is not uncommon to find the extract change to a brown magma or mush. Dose, ½ to 2 fluid drachms.