dried bark of the cascara buckthorn used as a laxative
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A North American buckthorn, Rhamnus purshiana, whose bark is used as a laxative
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Used as a laxative in constipation and various medical conditions, Cascara (cascara sagrada) is dried bark of Picramnia sp. (Simarubaceae) or Rhamnus purshiana (Rhamnaceae) containing stimulant laxative anthranol glycosides that act on the intestinal wall to increase muscle contractions and encourage bowel movements. (NCI04)
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Dried aged bark of a buckthorn, Frangula purshiana (FRANGULA), that contains the anthraquinone EMODIN and cascarosides. It is used as a laxative (CATHARTICS).