Dose, 1/5 - 1/2.; 12 - 30 mgms Colourless crystals, taste bitter, followed by a sensation of numbness. Soluble, 2 in 1 of water, 1 in 4 of alcohol, 1 in 4 of glycerin, insoluble in olive oil or ether. Incompatibles, as for alkaloids; and strong solutions of acids, or alkalies; calomel.

1Injectio Cocainae Hypodermica. Dose, 2 - 5 min.; 0.12 - 0.3 c.c. - 10; Salicylic Acid, 1.5; Water, recently boiled, 100. 1. gr. in 11 min.

1Lamellae CocainŠ. Gelatine. disks each containing 1/50 gr. of cocaine.

Trochiscus Krameriae et CocainŠ. - 1/20 gr.; Krameria, 1 gr.; with the Fruit Basis.

Coccus. Cochineal. The dried fecundated female insect, Coccus Cacti. About 1/5 of an inch long; roughly oval in outline, transversely wrinkled, concave beneath, convex above, purplish-gray in colour; when powdered, dark red. Contains a colouring principle, carmine.

Tinctura Cocci. Dose, 5 - 15 min.; 0.3 - 1 c.c. - 10; Alcohol 45%, 100: by maceration.

Codeina (see Opium p. 80).

Colchici Cormus. Colchicum Corm. Dose, 2 - 5 grs.; 1 - 3 dgms. The fresh corm is stripped of its coats, sliced transversely and dried. The dried slices are about 1/10 of an inch thick and about 1 broad, somewhat reniform in shape, whitish in colour; taste bitter; without odour; contains an alkaloid, colchicine, which is incompatible with iodides, guaia-cum, and all astringent preparations.

3Extractum Colchici. Dose, 1/4 - 1 gr.; 15 - 60 mgms. The juice of the fresh corms, expressed and dried to a soft consistence.

1Vinum Colchici. Dose, 10 - 30 min.; 1/2 - 2 c.c. Dried Corm, 20; Sherry, 100: by maceration.

Colchici Semina. Colchicum Seeds. The dried ripe seeds of Colchicum autumnale. About 1/10 inch in diameter, reddish-brown, rough, minutely pitted; very hard and tough; odourless, taste acrid and bitter. Contains the alkaloid, colchicine. Incompatibles, as above.

2Tinctura Colchici Seminum. Dose, 5 - 15 min.; 0.3 - 1 c.c. - 20; Alcohol 45%, 100: by percolation.

Collodium (see Pyroxylin p. 87).

Colocynthidis Pulpa. Colocynth Pulp. The dried pulp of the fruit of Citrullus Colocynthis, freed from its seeds. The pulp is light, spongy, whitish, odourless, intensely bitter.

1Extractum Colocynthidis Compositum. Dose, 2 - 8 grs.; 1 - 5 dgms.

A tincture of colcynth is made; the alcohol is evaporated off, the Extract of Barbadoes Aloes, Scammony Resin, Curd Soap and Cardamom Seeds are added and the whole evaporated to a firm extract.

1Pilula Colocynthidis Composita. Dose, 4 - 8 grs.; 2 1/2 - 5 dgms. (in 1 or 2 pills) - 18; Barbadoes Aloes, 36; Scammony Resin, 36; Potassium Sulphate, 4.5; Oil of Cloves, 4.5; Water, q.s. Each pill contains 3/4 gr. of Colocynth, and 1 1/2 grs. of both Scammony and Aloes.

1Pilula Colocynthidis et Hyoscyami. Dose, 4 - 8 grs.; 2 1/2 - 5 dgms (in 1 or 2 pills). - 66; Green Extract of Hyoscyamus, 33.

Confectiones. (See Piper, Rosa, Senna, Sulphur). Dose, 60-120 grs.; 4 - 8 gms.

Conii Folia. Conium Leaves. The fresh leaves and young branches of Conium maculatum, collected when the fruit begins to form. Stem smooth marked with dark purple spots, leaves large, pinnately divided, the lower decompound and at times 2 feet long; odour strong and mouselike, especially if rubbed with potassium hydrate. The chief active principle is the alkaloid, coniine.

Succus Conii. Dose, 1 - 2 fl. dr.; 4 - 8 c.c. - 66 of Juice expressed from the fresh leaves and branches with 33 of alcohol.

Unguentum Conii

200 evaporated to 25; Hydrous Wool Fat, 75.

Conii Fructus. Conium Fruit. (Hemlock Fruit.) The dried full-grown unripe fruit of Conium maculatum. Broadly ovoid, greenish-gray, about 1/8 inch long and broad; odour not marked unless rubbed with potassium hydrate, when strong and mouse-like. Active principle the alkaloid coniine.

Tinctura Conii. Dose, 30 - 60 min.; 2 - 4 c.c. - 20; Alcohol 70%, 100 by percolation.