Obs. In the Paris Codex Extracts are ordered to be prepared from henbane both by the processes Nos. 1 and 4 above.—Product (by the ordinary method):—1 lb. of the fresh leaves yielded fully 8 dr. of extract (Geiger); 1 cwt. yielded 4 to 5 lb. (Brande); 1 cwt. of the recent plant yielded, by an ordinary screw press, 591⁄2 lbs. of juice, and this evaporated in a water bath gave 5 lbs. 9 oz. of extract (Squire); 13⁄4 cwt. of the green herb yielded 11 lbs. of extract (Gray).—Dose, 2 to 10 gr.; as an anodyne, hypnotic, antispasmodic, sedative, and narcotic, more especially in those cases in which the use of opium is objectionable. Externally, as a topical application to sore or inflamed parts, either made into an ointment or spread on plaster.
5. (Alcoholic; Extractum hyoscyami alcoholicum, L.) The formulæ of the Ph. Bad., Par. & U. S. are similar to those for ALCOHOLIC EXTRACT OF ACONITE.
6. (E. of henbane seeds; Extractum seminum hyoscyami, L.—P. Cod.) An extract of the seeds made with spirit sp. gr. ·900 (=about 16 o. p.) is dissolved in 4 parts of cold water, and the solution filtered and evaporated. Stronger than the simple extract.—Dose, 1⁄4 to 3 gr.
Extract of Ho′ly This′tle. Syn. Extractum cardui benedicti, L. Prep. 1. (Ph. Baden.) From holy or blessed thistle (Carduus Benedictus) by displacement with cold water.
2. (Ph. Bor.) As EXTRACT OF GENTIAN—Ph. L. (nearly). Tonic, diaphoretic, febrifuge, often diuretic, and occasionally emetic.—Dose, 5 to 15 gr., as a tonic or stomachic chiefly.
Extract of Hops. Syn. Extractum lupuli (B. P., Ph. L. & E.), E. humuli (Ph. D.), L. Prep. 1. (B. P.) Hop, 8; rectified spirit, 15; distilled water, 80. Macerate the hop in the spirit for 7 days, press out the tincture, filter, and distil off the spirit, leaving a soft extract; boil the residual hop with the water for one hour, then express the liquor, strain, and evaporate on a water bath to the consistence of a soft extract. Mix the two extracts, and evaporate at a temperature not exceeding 160° to a pilular consistence.—Dose, 5 to 10 gr.
2. (Ph. L.) From commercial hops (the strobiles or catkins of Humulus Lupulus), 21⁄2 lbs.; boiling distilled water, 2 galls.; macerate for 24 hours, boil to a gallon, strain whilst hot, and evaporate to a proper consistence. The form of the Ph. E. is nearly similar.
3. (Ph. D.) As EXTRACT of ALOES—Ph. D. Tonic and stomachic, and slightly anodyne and hypnotic.—Dose, 5 gr. to 30 gr.; in dyspepsia, and cases that do not permit of the use of opium. 1 cwt. of ordinary hops yield about 40 lbs. of extract. (Brande.) The druggists usually employ hops 2 or more years old, called by the dealers ‘yearlings,’ ‘olds,’ or ‘old olds,’ because these may be purchased at 2⁄3 to 1⁄2 the price of those of the last season’s growth. The first of the above are estimated to have only 2⁄3 the strength of new hops; the second about 1⁄2; and the last little or none, at least in a medical point of view.
4. (Alcoholic; Extractum lupuli alcoholicum, L.—Cottereau.) By displacement with proof spirit. Stronger than the aqueous extract.
Extract of Hore′hound. Syn. Extractum marrubii, L. Prep. 1. From the fresh herb, as EXTRACT OF ACONITE.