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765. Ginger Ginger ia a sialogogue, carminative, and stimulant. It is used internally in flatulent colic, dyspepsia, and to prevent the griping of medicines. When chewed, it acts as a sialogogue, and is therefore useful in relaxed uvula. Dose, from ten to twenty grains of the powder; of the tincture, from ten minims to one drachm. [TO-DAY, HIS BEAUTEOUS VISAGE WE EXTOL.] 766. Epispastics and Rubefacients. These are remedies which are applied to blister and cause redness of the surface. They consist of cantharides, ammonia, Burgundy pitch, and mustard. 767. Cantharides, or Spanish flies Cantharides, or Spanish flies, when used internally, are diuretic and stimulant; and epispastic and rubefacient when applied externally. Mode of application.--A portion of the blistering plaster is spread with the thumb upon brown paper, linen, or leather, to the size required; its surface then slightly moistened with olive oil and sprinkled with camphor, and the plaster applied by a light bandage: or it is spread on adhesive plaster, and attached to the skin by the adhesive margin of the plaster. Caution.--If a blister is to be applied to the head, shave it at least ten hours before it is put on; it is better to place a thin piece of gauze, wetted with vinegar, between the skin and the blister. If a distressing feeling be experienced about the bladder, give warm and copious draughts of linseed tea, milk, or decoction of quince seeds, and apply warm fomentations of milk and water to the blistered surface. The period required for a blister to remain on varies from eight to ten hours for adults, and from twenty minutes to two hours for children: as soon as it is removed, if the blister is not raised, apply a "spongio-piline" poultice, and it will then rise properly. When it is required to act as a rubefacient, the blister should remain on from one to three hours for adults, and from fifteen to forty minutes for children.