An aqueous solution of hydrate of potassium (KHO; 56) containing 5.84 per cent. of the hydrate, B.P.; about 5 per cent., U.S.P.

Dose. - 15 to 60 minims.

Uses. - Dilute liquor potassae is used externally as a lotion in freckles, and when diluted with water in the proportion of 1 to 6, is employed in order to soften ingrowing toe-nails. Internally it acts both as a direct and remote antacid and as an alterative. It is given in scaly skin-diseases, in eczema and acne, especially when these occur in gouty subjects, or are accompanied by acidity of the stomach. In cases of dyspepsia, with irritability, it is said to have a sedative action upon the stomach, and thus to be preferable to the bicarbonate. It is believed to be useful in jaundice, and in enlargement or cancer of the liver. For its action upon the system it has been administered in rheumatism, both acute and chronic. It is given to cause the absorption of fat in obese persons, but may destroy the general health (cf. p. 599). It has been used to cause the absorption of scrofulous glands and of bronchocele. It increases the bronchial secretion, and renders it more liquid and easier to cough up. It is therefore useful in bronchitis where the secretion is scanty and difficult to expectorate, and is equally serviceable in the intercurrent bronchitic attacks to which phthisical patients are liable (p. 252).