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Local Anaesthetics.—As a rule, are injected hypodermically or applied to open wounds. They cause temporary loss of local or circumscribed sensation by paralyzing the sensory nerves. When applied in the form of liniments they resemble anodynes, but act more promptly and profoundly. They comprise Cocaine, Eucaine, etc.

Analgesic.—A medicine used to relieve pain, as Opium, etc.

Anaphrodisiac.—A medicine used to produce absence or impairment of sexual appetite, as Potassium Bromide, etc.

Anhidrotic.—A medicine that diminishes the secretion of perspiration as Belladonna, etc.

Anodyne.—A medicine that lessens sensibility to pain, by diminishing the excitability of nerve centers, as Cannabis Indica, Chloral Hydrate, etc.

Anodynes Local.—Are drugs that diminish pain by acting locally on sensory nerves, and are applied in the form of a liniment over painful swellings, as Belladonna, Aconite, Opium, hot and cold packs, etc.

Antacid.—A medicine that counteracts or neutralizes acidity of the stomach or intestines as liquor Potassium, Sodium Carbonate and Bicarbonate, etc.