Bicarbonate of Potash. KO, HO, 2 CO2. Comp. 1 Eq. Potash = 47, +2 Eq. Carbonic Acid = 44, + 1 Water = 9 - 100.
Med. Prop. and Action. Antacid, alterative, and diuretic. It is readily absorbed, and renders the blood, urine, and probably other secretions highly alkaline: hence its alterative effect (Garrod). It also increases the action of the kidneys. In Dyspepsia depending on undue acidity, it is prescribed with much benefit, and it is very useful where there is an excess of Uric Acid in the urine. It is also valuable in Inflammatory Affections, especially in Acute Rheumatism. According to Dr. Garrod, it does not produce the same sedative effect on the stomach as does Liquor PotassAe.* It is frequently used in the form of effervescing draughts (gr. xx. of the Bicarbonate saturates gr. xiv. of Citric Acid, or fl. drs. iiiss. of Lemon-juice).
Dose, gr. x. - gr. xxx. It should be freely diluted.
Incompatibles. The same as PotassAe Carbonas.
In Acute Rheumatism, Dr. Garrod employed the Bicarbonate successfully in 51 cases. He prescribed it in doses of ij. freely diluted, every two hours night and day, until the patient was free from all articular affection and febrile disturbance for two or three days. Local depletion over the heart was employed, if that organ became implicated. The average duration of treatment was 7 1/2 days. It renders the urine highly alkaline. No gastric or other unpleasant symptom followed the use of this salt, even in the above large doses.
It may also be prescribed with advantage in the same affections as PotassAe Carbonas (q. v.).