Extractum Calami Fluidum (U. S. P.)—Fluid Extract of Calamus.
Related entry: Calamus (U. S. P.)—Sweet Flag
Preparation.—"Calamus, in No. 60 powder, one thousand grammes (1000 Gm.) [2 lb. av., 3 ozs., 120 grs.]; alcohol, a sufficient quantity, to make one thousand cubic centimeters (1000 Cc.) [33 fl℥, 391♏], Moisten the powder with three hundred and fifty cubic centimeters (350 Cc.) [11 fl℥, 401♏] of alcohol, and pack it firmly in a cylindrical percolator; then add enough alcohol 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 alcohol until the calamus 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 alcohol to make the fluid extract measure one thousand cubic centimeters (1000 Cc.) [33 fl℥, 391♏]"—(U. S. P.).
Description, Medical Uses, and Dosage.—This preparation has the characteristic taste and odor of calamus. If made from peeled calamus, it is of a brown-yellow color; if from unpeeled root, it has a deeper hue. Uses same as calamus. Dose, 5 to 20 minims.