A black, shining powder, prepared from the root of Leptandra Virginica, a plant indigenous in North America. Nat. Ord. Scrophulariaceae. The designation properly belongs to the bitter crystallizable principle contained in the root of this plant, hut of the virtues of the latter nothing is at present known.

Med. Prop. and Action. The effect of Leptandrin is gently to excite the liver and promote the secretion of bile without producing the least irritation of the bowels. It does not purge at all, and even its laxative effect is very slight, while on the stomach it acts as a decided tonic; hence it is most valuable in Diarrhoea and Chronic Dysentery, when the stools are destitute of bile, and the mucous membrane is irritable. Under its use the stools are said soon to assume a natural colour and consistence. In Torpidity of the Liver, it is thought to be superior to Blue Pill. In Intermittents, if given with Quinine, it is thought to render the action of the latter more certain and effectual. It is apparently a valuable remedy in some forms of Dyspepsia. It is also highly commended in Epidemic Dysentery and Infantile Cholera. It is said to be a valuable adjunct to Podophyllin and Iridin.*

Dose, gr. 1/2 - ij., three or four times daily.

Limonis Cortex, Limonis Oleum, Limonis Succus. See Citrus.