Extract of Valer′ian. Syn. Extractum valerianæ, L. Prep. 1. From valerian root, as EXTRACT OF HOP—Ph. L.; but using a covered vessel.
2. (Ph. Bor. and Baden.) As EXTRACT OF CINCHONA—Ph. L. (nearly), employing strong force in the expression of the liquor, and only evaporating to the consistence of syrup.
Obs. It is usual to add to this extract a little of the ESSENTIAL OIL OF VALERIAN, dissolved in a small quantity of rectified spirit, just before removing it from the evaporating-pan, and when nearly cold. Anti-spasmodic and nervine.—Dose, 10 gr. to 1⁄2 dr. In hysteric
and spasmodic diseases. Valerian yields about 40% of soft extract.
3. (Alcoholic; Extractum valerianæ alcoholicum, L.—P. Cod.) As EXTRACT OF BOX.—P. Cod.
4. (Fluid; Extractum valerianæ fluidum, L.—Ph. U. S.). Rectified spirit, 12 fl. oz.; mix, add of valerian (in coarse powder), 8 oz. digest and percolate, adding, subsequently, spirit (at or near proof) until 16 fl. oz. of tincture have passed through; let this evaporate spontaneously, in a shallow vessel, until reduced to 5 fl. oz.; in the meantime add fresh spirit to the mass in the percolator, until 10 fl. oz. more of tincture are obtained, which add to the above residuum of the evaporation, observing to dissolve any oleo-resinous deposit in a little rectified spirit, and add to it to the rest; lastly, filter, and add of rectified spirit, q. s. to make the whole measure 16 fl. oz.
Extract of Vanil′la. See Liquor of Vanilla.
Extract of Wall Pel′litory. Syn. Extractum parietariæ, L. Prep. From fresh wall-pellitory (Parietaria officinalis), as EXTRACT OF ACONITE—Ph. L. Aperient, diuretic, and pectoral.—Dose, 10 gr. to 1⁄2 dr.
Extract of Wal′nut. Syn. Extractum juglandis immaturæ, L. Prep. 1. From unripe walnuts (Juglans regia), as EXTRACT OF ACONITE—Ph. L.
2. From the decoction of the green shells. Vermifuge.—Dose, 20 to 30 gr. in cinnamon water.