3. (Ph. U. S. Extractum senegæ fluidum.) As EXTRACT OF COTTON-ROOT. (Ph. U. S.)
Extract of Sen′na. Syn. Extractum sennæ, L. Prep. 1. (Extractum sennæ aquosum, L.)—a. As EXTRACT OF COLOCYNTH—Ph. L.
b. (P. Cod.) As EXTRACT OF BISTORT—P. Cod.
c. (Ph. Bor.) From senna leaves, by maceration in tepid water (104° Fahr.) for 24
hours, and expression and filtration; the operation is repeated with fresh water, and the strained liquors evaporated to a thick extract (at 149° to 157° Fahr.), which is dissolved in water, 4 parts, the solution filtered, and again evaporated.—Dose, 10 to 20 gr. It is principally used as a basis for purgative pill. When prepared by decoction it is nearly inert. A better extract is prepared from the common tincture made with proof spirit.
2. Alcoholic; Extractum sennæ alcoholicum, L.—(Guibourt.) Senna (in powder), 1 part; rectified spirit, 5 parts; heat gradually to boiling, let it cool; in 24 hours express, strain, and repeat the process with fresh spirit; lastly, distil and evaporate. Proof spirit answers for this purpose.
3. (Fluid; Extractum sennæ fluidum, L.—Ph. (U. S.) Senna (in coarse powder), 21⁄2 lbs.; spirit (at or near proof), 64 fl. oz.; macerate 24 hours, then act by displacement, subsequently adding weak spirit (1 of rectified spirit to 3 of water) until 10 pints of tincture are obtained; evaporate to 1 pint, filter, add sugar, 20 oz., and oil of fennel, 1 fl. dr. (dissolved in) compound spirit of ether, 2 fl. dr. Every fl. oz. represents 1 oz. of senna.
Extract of Smoke. Syn. Extractum fuliginis, L. Prep. 1. (Aqueous.) Wood-soot, 2 oz.; water, 1 pint; boil to 16 fl. oz., filter, and evaporate.
2. (Acetic.) Wood-soot, 2 oz.; distilled vinegar and water, of each, 1⁄2 pint; as the last. Formerly reputed antispasmodic, alterative, &c.—Dose, 3 to 6 gr., 2 three times a day; in dyspepsia, hysteria, cancer, scrofula, and various syphilitical affections.
Extract of Snake-root. See Extract of Senega.