Elderly people who are constipated can drink senna if they are constipated with hot constipation. But need to follow the doctor’s instructions for medication. Senna, sweet, bitter, cold; to the large intestine meridian. It has the efficacy of diarrhea heat and stagnation, eliminating food and water. The main treatment of heat constipation, puerperal constipation, stagnation and bloating, edema and fullness. Attention, senna adverse reactions: taking too much or not the right medicine can cause poisoning, poisoning symptoms for nausea, vomiting, abdominal pain. It is contraindicated for weak and pregnant women. Patients with low blood pressure should not take a large number of long-term use. Slippery semen, impotence people avoid taking for a long time, more use. Elderly people with constipation, it is recommended to the regular hospital by the doctor for diagnosis and treatment, not blindly self-medication to avoid adverse consequences.