Acid Tartrate of Potash.

HO, KO, C8H4O10. PotassAe Bitartras. Bitartrate of Potash (Pharm. L., E., D.). Called, also, Supertartrate of Potash. Cream of Tartar. Comp. Potash 25.00, Tartaric Acid 70.21, Water 4.79, in 100 parts; or 1 Eq.

Potash 47, + 1 Eq. Tartaric Acid = 132, + 1 Water = 9

= 188, Eq. Wt.

Med. Prop. and Action. In doses of gr. xx. - gr. lx., frequently repeated and largely diluted, it acts as a refrigerant and diuretic, communicating alkaline properties to the urine, in which it has been detected in the form of carbonate. In doses of gr. lx. - gr. cxx., it acts as a mild aperient; and in larger doses as a hydragogue cathartic. Dr. A. T. Thompson § observes, that it operates more on the smaller intestines than the Tartrate, producing watery stools and flatulence, and, in some persons, griping. From its hydragogue, purga-gative action, it is advantageously prescribed in dropsical affections. If its use be continued for too long a period, it induces emaciation and derangement of the digestive organs. Post-mortem examinations of persons who have died from over-doses show extensive inflammation of the stomach and intestines. When its purgative action is desired, it is best given combined with other purgatives; of these, Jalap, in the form of Pulv. Jalapse Co., is the best which can be employed. Dissolved in water and flavoured, it makes a good refrigerant drink in fevers, &c. fir. clxxx. of the Bitartrate, and gr. cxx. of the Carbonate of Soda, both in solution, and mixed, form an agreeable effervescing aperient.

* Lib. of Med., vol. i. p. 285. . Prov. Journ., April 4, 1849.

Cyc. Pract. Med., art. Cathartics § Ibid., vol. i. p. 371.

Offlc. Prep. 1. Confectio Sulphuris (Sublimed Sulphur oz. iv.; Acid Tartrate of Potash in powder oz. j.; Syrup of Orange Peel fl. oz. iv. Rub them well together). Dose, gr. xxx. - gr. cxx.

2. Pulvis Jalapae Compositus (Powdered Jalap Oz

v.; Acid Tartrate of Potash oz. ix.; Powdered Ginger oz. j.). Dose, gr. xx. - gr. lx.

Dose of Bitartrate of Potash: as a refrigerant and diuretic, gr. xx. - gr. lx.; as a purgative, gr. lx. - gr. clxxx.

Incompatibles. Acids and Acidulous Salts; Alkalies and their Carbonates; the Salts of Lead, Silver, and Copper.

2250. Therapeutic Uses

In Dropsical Affections, the Acid Tartrate, either alone or combined with Digitalis, Squills, &c, is a very valuable remedy. It increases the quantity of urine, produces copious watery stools, and, in some instances, lessens the dropsical swelling in a marked manner, in a few days. In others, this effect is not seen for three or four weeks. Dr. Hope,* who speaks highly of its efficacy, advises that its use should be occasionally intermitted, as, if long continued, it appears, in some instances, to lose its diuretic powers. As a purgative, Dr. Watson advises ss. of this salt, dissolved in Aq. Menth. Pip. f vj., to be given in one dose every morning, or in combination with Gamboge, thus: - ℞ Cambog. gr. j. - ij., Potas. Bitart 3j., Aq. Menth. P. fij., M. ft haust. bis terve die sumend.