Preparation The drug is collected in summer and autumn, scalded to death with boiling water, dried in the sun or at a low temperature. Before use, the drug is stir-fried until brown in color, and ground into powder. Actions breaks blood stasis, reduces immobile masses. Medical Indications amenorrhea, traumatic injuries, and immobile abdominal masses due to blood stagnation. Contraindications not to be used during pregnancy, not to be used together with anticoagulant drugs.