This is a British officinal, prepared from carbonate of lithia by adding it, in successive portions, to a solution of citric acid, and carefully evaporating to dryness. As it is a deliquescent salt, it must be kept in well-closed bottles. it consists of three eqs of lithia and one of citric acid. Citrate of lithia is in the form of a white powder, soluble in 2.5 parts of water, of a mild taste less disagreeable than that of the carbonate, into which it is converted by a high heat with access of air. it is antacid in its influence on the blood and urine; the acid being decomposed, and the alkali entering into the circulation, and passing out by the kidneys. it may, therefore, be given in the same affections as the carbonate, over which it has the advantage of being less unpleasant to the taste, and less liable to irritate the stomach. The dose is from five to ten grains.