DERIVATION.--Potassium bicarbonate is obtained by saturating a strong
aqueous solution of potassium carbonate and carbonic anhydride.
PROPERTIES.--Colorless, transparent, monoclinic prisms, odorless and
having a saline and slightly alkaline taste. Permanent in the air.
Soluble in water. Almost soluble in alcohol.
DOSE.--Same as potassium carbonate.
ACTION AND USES.--They stimulate the production of gastric juice when
administered before meals with bitter tonics, or after meals to overcome
excessive acidity of the stomach; used in rheumatism and gouty condition
to make blood alkaline and overcome lactic acid. Useful as an antacid in
nettle-rash and other itching skin diseases. Internally and externally
as a mild wash, two to four drachms to the pint. A solution of the same
strength is injected to overcome acidity of the uterus in leucorrhoea,
etc. Calculus made up of ammonium, magnesium and phosphates occur in the
bladder and urethra of highly fed rams and wethers. For this use
potassium bicarbonate one-half to one drachm, well diluted, conjoined
with laxative diet and belladonna to dilate urethra; it is less certain
as a diuretic than the acetate or nitrate of potassium.