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284 DENTAL MEDICINE.
Medical Properties and Jetton.—It is antacid, stimulant, dia-
phoretic and expectorant, and it is considered to be especially
useful in cases where the vital powers are greatly depressed. In
large doses it causes colic, convulsions and great disturbance of
the nervous system, and when long continued, an annoying itch-
ing of the scalp, and skin over the surface of the body. It has
a tendency to fluidify the blood. Internally, as a (diffusible stim-
ulant, it is preferred to solution of ammonia.
Therapeutic Uses.—It is internally administered in diabetes,
scrofula with languid circulation, asthma, pneumonia, croup,
chorea, diseases of the skin, puerperal insanity, mercurial
erethism, drunkenness, etc., etc.
Externally it is employed as a volatile or smelling salts, in
syncope, hysteria, and asphyxia.
Dose.—Of carbonate of ammonium, gr. v to gr. x, in pill or
in solution with gum and sugar.
Dental Uses.— It is a useful internal remedy in cancrum oris,
in doses of gr. v, gradually increased to gr. x, every two or three
hours, using strong nitric acid as a local application. It is also
a very useful remedy in mercurial erethism, in conjunction with
camphor and other stimulants ; also as a stimulant in dangerous
narcosis from anaesthetic agents.

AMMONII CHLORIDUM—CHLORIDE OF AMMONIUM.
MURIATE OF AMMONIA HYDROCHLORATE OF AMMONIA SAL
AMMONIAC.
Formula.—1 Derivation.—Chloride of Ammonium is obtained by neutraliz-
ing hydrochloric acid with ammonia and evaporating to dryness.
It is in the form of a snow-white, crystalline powder, soluble
in two and a half parts of cold water, and sparingly soluble in
alcohol. It has a pungent, saline taste.
Medical Properties and Action.—In large doses it is an irritant
poison, with a purging action ; but in small doses it is a power-
ful resolvent alterative; it is also refrigerant and anodyne. Its
action upon the system closely resembles that of mercury as an
alterative.