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228 DENTAL MEDICINE.
For Ulceration of Mucous Membrane, For Scorbutic Gums,
R . Acidi hydrochlorici di
R, Acidi hydrochlorici di-
j^^j ^^
l"t' SiJ
Mellis,
Glycerini 31V
Aquae rosae aii f^j. M.
. . . .
Aqu^ . 5x. M.
destillatae
.
SiGNA.-Apply with a camel-hair pen-
SiGNA.—To be used as a gargle. cil 3 or 4 times a day.
ACIDUM NITRICUM—NITRIC ACID.
AQUA FORTIS.
Formula.—HNO3. Sp. gr., 1.420.
Derivation.—Nitric acid is obtained by the action of sulphuric
acid upon nitrate of potash or soda. When strong and pure it
is colorless, but on account of the presence of nitric peroxide it
is generally of a yellow color, and emits acrid, corrosive fumes.
Medical Properties and Physiological Action.—Pure nitric acid is
a powerful caustic and escharotic, and leaves a permanent stain
on the cuticle. It is not employed in its concentrated form in-
ternally, but externally, as an escharotic to destroy warts and
in a diluted form it is employed as an
stimulate sluggish sinuses ;
astringent wash or gargle. The antidotes in cases of poisoning
are magnesia or soap, and mucilaginous drinks.
Therapeutic Uses.—The strong acid is employed externally in
hospital gangrene, and phagedenic ulcerations ; hemorrhoids and
painful hemorrhoidal tumors, syphilitic condylomata, syphilitic
sore throat, malignant ulcers, obstinate skin diseases, etc.
Diluted Nitric Acid.— Jcidum Nitricum Dilutum contains
three ounces of acid in every pint of the diluted acid.
Medical Properties and Physiological Action.—It is an antalka-
line, alterative tonic and refrigerant, and has a very direct action
on the liver, and if its use is continued for a long time it causes
salivation and loosening of the teeth. It coagulates albumen.
Like all mineral acids, it injures the teeth, when brought in con-
tact with them ; hence, proper care should be taken to prevent
such action, such as the use of alkaline gargles before and after
taking the acid into the mouth, which should be done through a
glass tube or quill. As a tonic it is advantageously employed
during convalescence and inflammation, and in cachexia follow-