c. (D. of red b.; D. c. rubræ, Ph. L.) From red bark, as above (a).
2. (Ph. E.) Brown, grey, yellow, or red cinchona (bruised), 1 oz.; water, 24 fl. oz.; boil for 10 minutes; when cold filter the liquor, and evaporate it to 16 fl. oz.
3. (Ph. D.) From pale or loxa bark, similar to the ‘Decoctum cinchonæ pallidæ’ of Ph. L. (1. b. above).
Dose, &c. 1 to 2 fl. oz., 3 or 4 times daily, as a tonic, stomachic, and febrifuge, when the stomach will not bear the administration of bark in powder; in fevers, dyspepsia, convalescence, &c. The plan recommended by the
Edinburgh College of filtering the decoction when cold is absurd. According to Soubeiran, 146 gr. of the deposit thus removed contained 86 gr. soluble in alcohol, and rich in the cinchona alkaloids. This liquid should, therefore, be well shaken before pouring it out for use, instead of being filtered. The addition of a few drops of either sulphuric or hydrochloric acid to the water greatly increases its solvent power, and also, consequently, the medicinal value of this preparation. (See below.)
Decoction of Bark (Acid′ulated). Syn. Decoctum cinchonæ acidula′tum, L. Prep. 1. To the water for any one of the above, add dilute sulphuric acid, 11⁄2 fl. dr.; boil 10 minutes, and strain whilst hot.
2. (Sir J. Wylie.) Cinchona bark, 1 oz.; water, 16 fl. oz.; diluted sulphuric acid, 1 dr.; as last.
Decoction of Bark (Facti′′tious). Syn. Decoctum cinchonæ factitium, L. Prep. (Ph. Bor.) Willow bark and horse-chestnut bark, of each 1⁄2 oz.; calamus root and cloves, of each 1⁄4 oz.; water, 16 fl. oz.; boil to one half. Used as a substitute for decoction of cinchona bark, but is vastly inferior.
Decoction of Bark and Ser′pentary. Syn. Decoctum cinchonæ cum serpenta′ria, L. Prep. (Sir J. Pringle.) Peruvian bark, 3 dr.; water, 1 pint; boil to one half, and infuse in the hot decoction, serpentaria root, 3 dr. As a diaphoretic stimulant, and tonic, in fevers, and as a gargle in sore throat.
Decoction of Bar′ley. Syn. Barley-water; Decoctum hor′dei (B. P.), L. Prep. 1. (B. P.) Pearl barley, 1 oz. (washed clean); boil for 20 minutes in 15 oz. of water, and strain.