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 expre ion 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 di olved 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 alcohol i cum , L.—(Guibourt.) Senna (in powder), 1 part; rectified spirit, 5 parts; heat gradually to boiling, let it cool; in 24 hours expre , strain, and repeat the proce 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), 2 1 ⁄ 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. (di olved in) compound spirit of ether, 2 fl. dr. Every fl. oz. represents 1 oz. of senna.