ANTACIDS.--Agents which neutralize, by their chemical action, acids in the stomach; as ammonia, carbonate of potassa, chalk, lime-water, magnesia, and soda. ANTHELMINTICS.--Remedies used for the expulsion of worms from the stomach and intestines. These may act chemically or by their cathartic operation. The most reliable are AEthiops mineral, nux vomica, preparations of mercury, wormwood, etc. ANTHELMINTIC POWDERS.--Nux vomica, in one half-drachm doses, two or three times daily, to an ox or cow; for calves, the dose must be diminished, according to age. ANTIDOTES.--Medicines which neutralize the effects of poisons by a chemical union, forming an insoluble compound, or a mild, harmless one. Alkaline solutions are antidotes for the mineral acids; as soap in solution, a simple remedy, and always at hand. Lard, magnesia, and oil are antidotes for poisoning by arsenic; albumen,--in the form of the white of an egg,--milk, etc., for corrosive sublimate, and other mercurial preparations. ANTISEPTICS.--Medicines which prevent putridity in animal substances, and arrest putrefaction, when already existing. These are used both externally and internally. The chief specifics of this class are the acids, alcohol, ammonia, asafoetida, camphor, charcoal, chloride of lime, cinchona, ether, and opium. ANTISPASMODICS.--Medicines which exert their power in allaying inordinate motions or spasms in the system, arising from various causes, such as debility, worms, etc. Those most generally in use are ammonia, asafoetida, camphor, cinchona, ether, lactacarium, mercury, and opium. ANTISPASMODIC DRAUGHT.--Tincture of opium, one ounce; nitric ether, two ounces; water, one-half pint. Mix for drench; if repeated, it should be followed by a purgative, as soon as the spasms have subsided. Or, use the following: sulphuric ether, one to two ounces; water, one-half pint Mix for drench; repeat every hour, if necessary. AROMATICS.--Medicines possessing a grateful, spicy scent, and an agreeable, pungent taste; as anise-seed, cardamoms, cinnamon, cloves, ginger, etc. They are principally used in combination with purgatives, stomachics, and tonics. ASTRINGENTS.--Medicines which serve to diminish excessive discharges, as in diabetes, diarrhoea, etc. The principal agents of this class are the acids, alum, chalk, lime-water, opium, and the sulphate of copper, lead, iron, or zinc. ASTRINGENT POWDER.--Opium, one drachm; prepared chalk, half an ounce; Jamaica ginger, six drachms. Mix, and divide into four powders; one to be given every hour, in a little flour gruel. Or, the following: opium, one drachm; catechu, two drachms; prepared chalk, one ounce. Mix, and divide into four powders; to be given as before. CARDIACS.--Cordials--so termed, from their possessing warm and stimulating properties--given to invigorate the system.