Extract of Cel′andine. Syn. Extractum chelidonii, L. Prep. 1. (Ph. Bor.) From the herb (Chelidonium majus), as ALCOHOLIC EXTRACT OF ACONITE—Ph. Bor.—Dose, 3 to 10 gr.
2. (Van Mons.) From the expressed juice, coagulated by heat, filtered, and evaporated, towards the end adding the coagulum.—Dose, 5 to 15 gr., or more. Used as a drastic hydragogue in dropsies; and in scrofula, &c.
Extract of Cen′taury. Syn. Extractum centaurii, L. Extracts under this name are prepared from ‘American centaury’ (Sabbatia angularis), and ‘common centaury’ (Erythræa Centaurium). Prep. 1. By evaporating the decoction, or the infusion made with hot water. The dose and properties resemble those of extract of gentian.
2. (Alcoholic; E. c. alcoholicum, L.) As EXTRACT OF BOX (see above).
Extract of Cevadil′′la. Syn. Alcoholic extract of sabadilla; Extractum sabadillæ, L. Prep. (Dr Turnbull.) From tincture of cevadilla seeds, made with rectified spirit. Employed by Dr Turnbull as a remedy in painful rheumatic and neuralgic affections, and, generally, as a substitute for VERATRIA.—Dose, 1⁄10 to 1⁄6 gr. It is extremely poisonous.
Extract of Cham′omile. Syn. Extractum anthemidis (Ph. E.), E. a. nobilis, L. Prep.
By evaporating the decoction of the flowers to the proper consistence.
Obs. This extract contains only the bitter portion of the chamomile, the aromatic volatile oil being dissipated during the evaporation. This, however is remedied in the formulæ given by the British Pharmacopœia, which is as follows:—
Boil chamomile flowers 1 lb., in one gallon of distilled water, until the volume is reduced to one half; strain, press and filter. Evaporate by a water bath to a proper consistence, adding oil of chamomile, 15 minims at the end of the process.
It is usually prepared from old flowers that have lost their smell and colour, and are thus rendered unsaleable. The extract of chamomile that smells strongly of the flowers, frequently vended by the druggists, is prepared by adding 1 dr. of the essential oil of chamomile to every pound of extract, when nearly cold, and just before removing it from the evaporating pan. This addition, unlike many which are made in the laboratory, vastly increases the medicinal virtues of this article. The mass of extract of chamomile met with in the shops is nothing but extract of gentian scented with a little oil of chamomile. 1 cwt. of chamomiles yields about 48 lbs. of extract.