Extract of Contrayer′va. Syn. Extractum contrayervæ, L. Prep. (Palat. Cod.) From contrayerva root, as EXTRACT OF CINCHONA—Ph. L.—Dose, 10 gr. to 1⁄2 dr.; as a diaphoretic tonic in low conditions of the system.
Extract of Copai′ba. Syn. Resinous extract of copaiba; Extractum copaibæ, E. c. resinosum, L. Prep. (Mr Thorn.) From balsam of copaiba, by distilling off the oil until the residuum assumes the consistence of an extract.—Dose, 10 to 20 gr., or more. One of the many useless preparations which encumber modern pharmacy. It may be taken in 3 dr. doses without any perceptible effect beyond a fit of indigestion.
Extract of Copal′che. Syn. Extractum copalchi, E. corticis c., L. Prep. From copalchi bark (Croton pseudo-China), as EXTRACT OF CASCARILLA, which it for the most part resembles.—Dose, 1 to 3 gr.
Extract (Fluid) of Cotton Root. Syn. Extractum gossypii radicis fluidum (Ph. U. S.). Cotton root in very fine powder, 16 oz. (troy); macerate with glycerin, 3 fluid oz. (old measure); rectified spirit, 8 oz. (old measure); water, 5 oz. (old measure), in closed percolator for 4 days; then let the percolation commence, and finish it by adding dilute alcohol (eq. vols. of alcohol ·835 and water) until 24 oz. (old measure) have been obtained; reserve the first 14 oz., and evaporate the remaining 10 oz. (to which previously add 1 fluid oz., old measure) of glycerin to 2 fluid oz. (old measure), and mix with the reserved portion.
Extract of Couch Grass. Syn. Extract of dog’s grass; Extractum graminis, L. Prep. 1. (P. Cod.) From the root of couch grass, or dog’s grass (Triticum repens), as EXTRACT OF BISTORT—P. Cod.
2. From the fresh root, as EXTRACT OF ACONITE—Ph. L.
3. (Fluid; Mellago graminis, Extractum graminis fluidum, L.—Ph. Hann. 1831.) From the decoction of the fresh root of couch grass, evaporated to the consistence of new honey. Pectoral.—Dose, 15 gr. to 1⁄2 dr., or more.
Extract of Cu′bebs. Syn. Extractum cubebæ, L. Prep. 1. From the alcoholic tincture evaporated by a very gentle heat.—Dose, 5 gr. to 30 gr.
2. (Mr Toller.) To the last add a little powdered Castile soap, when it begins to thicken, and evaporate to a pilular consistence.—Dose, 10 gr. to 30 gr.
3. (Fluid: Liquor cubebæ, Extractum c. fluidum, L.)—a. Cubebs (ground in a coffee-mill), 11⁄4 lb.; rectified spirit, 1 quart; prepare a tincture, either by displacement or by digestion for a week, and reduce it, by distillation at a very gentle heat, until the whole measures exactly 1 pint. Every fl. oz. represents 2 oz. of cubebs.—Dose, 20 to 40 drops.