The side effects of Senna are nausea, vomiting, and abdominal pain if the dose is taken in excess. Its contraindications are not clear, but it should be noted that the body is weak and pregnant women should not take. Chronic enteritis, diarrhea, glaucoma patients should not take. Patients with low blood pressure should not take a large number of long-term. Slippery semen, impotence should not be taken for a long time, more use. Should not be used with oyster, Bai Wei, Poria. Senna leaf, for the leguminous plant narrow-leaved senna or pointed-leaved senna dried leaflets. This product is bitter and cold, not only can drain stagnation, but also can clear and direct the real heat, suitable for hot constipation or senile constipation or habitual constipation. If the heat constipation, abdominal fullness and pain, with rhubarb and citrus aurantium and other drugs to enhance the role of diarrhea. This product can also diarrhea down to move water to eliminate flatulence, used in the treatment of edema and distension, etc., often used together with the big abdominal skin, petunia seeds and other drugs. Drugs should be used under the standardized guidance of professional Chinese medicine practitioners under the guidance of identification, and should not be taken on their own to avoid risks.