Castor Seed is the dried ripe seed of Ricinus communis L. (Fam. Euphorbiaceae).

Action: To induce subsidence of swelling and remove toxic substances, to cause purgation.

Indications: Carbuncle, boil and other pyogenic infections of the skin, sore throat, scrofula; constipation.

Usage: For external use, appyogenic quantity to be pounded into paste and applied topically ; also used in making pills for oral administration.