Blackend Swallowwort Root is the dried root and rhizoma of Cynanchum atratum Bge. or Cynanchum versicolor Bge. (Fam.Asclepiadaceae).

Action: To remove heat from blood, to relieve dysuria, and to counteract toxicity and cure sores.

Indications: Febrile diseases with invasion of the pathogenic factors into the blood; fever due to deficiency of yin, in phthisis, or due to deficiency of blood after delivery; acute urinary infection, dysuria with hematuria; carbuncles and other subcutaneous pyogenic infections.