Jalap consists of the dried tuberous root of Exogonium Purga (Fam. Convolvu-lacece), a perennial herb, native to Eastern Mexico. It yields not less than 7% of resinous principles.

Properties of Jalap powder:

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Jalap is a powerful hydrogogue purgative. Dose, 1 Gm.

Official preparations are: Compound Cathartic Pill, Compound Powder, and the Resin.