Blue, odorless crystals or powder with a metallic taste. Freely soluble in water (1:2.5), and slightly soluble in alcohol (1:500). ACTION AND USES: Astringent and in strong solutions corrosive. In large doses a gastric and intestinal irritant producing violent vomiting and purging. Considered one of the best antidotes in phosphorus poisoning. DOSAGE: Emetic, 0.25 Gm. or 4 grains (U.S.P.). _Mistura Adstringens (Mist. Adstring.), Astringent Mixture, N.F._ (Mistura Adstringens et Escharotica, N.F. III, Villate's Mixture).--A needlessly complex mixture containing the acetates and sulphates of copper and zinc in dilute acetic acid solution with lead sulphate in suspension. =Cypripedium (Cypriped.), Cypripedium, N.F.= (Lady Slipper Root).--Rhizome and roots. ACTION AND USES: No definite indications for its use. Has been described as "tonic, stimulant and diaphoretic." DOSAGE: 1 Gm. or 15 grains (U.S.P.). _Fluidextractum Cypripedii (Fldext. Cypriped.), Fluidextract of Cypripedium, N.F._--Cypripedium (100%). Absolute alcohol content about 40 per cent. DOSAGE: 1 Cc. or 15 minims (N.F.). =Damiana (Damiana), Damiana, N.F.= (Turnera).--Leaves. ACTION AND USES: Ingredient of "lost manhood" nostrums; mildly irritant, but otherwise probably inert. DOSAGE: 2 Gm. or 30 grains (N.F.). _Fluidextractum Damianae (Fldext. Damian.), Fluidextract of Damiana, N.F._ (Fluidextractum Turnerae, N.F. III).--Damiana (100%). Absolute alcohol content about 60 per cent. DOSAGE: 2 Cc. or 30 minims (N.F.). =DECOCTA, DECOCTIONS.=--Aqueous preparations made by boiling drugs in water and straining. They must be freshly made from the drugs. =Delphinium (Delphin.), Larkspur Seed, N.F.= ACTION AND USES: Preparations are used externally to destroy pediculi of the hair and of the pubic region. _Tinctura Delphinii (Tr. Delphin.), Tincture of Larkspur, N.F._--Larkspur seed (10%) in alcohol. Absolute alcohol content about 90 per cent. =Dextrinum Album (Dext. Alb.), White Dextrin, N.F.=--A variable mixture of soluble carbohydrates with unconverted starch. White, odorless powder, with a sweetish taste. Partly soluble in cold water; completely soluble in three parts of water on boiling. ACTION AND USES: Substitute for acacia and other gums. _Pasta Dextrinata (Past. Dextrin.), Dextrinated Paste, N.F._--White dextrin (33%) in glycerin (33%) and water. USES: Basis for dermatologic pastes =Diacetylmorphina (Diacetylmorph.), Diacetylmorphine, U.S.P.= (Acetomorphine, Heroin).--An alkaloid prepared from morphine by acetylization. White, odorless powder. Very slightly soluble in water (1:1700) and soluble in alcohol (1:31) and in chloroform (1:1.4). ACTION AND USES: Used as a respiratory sedative to relieve cough. With few exceptions, generally contraindicated in pulmonary tuberculosis. Like morphine, but more toxic and less valuable for the relief of pain. Is habit-forming. See =Morphina=.