The efficacy of Si Mu Tang for the elderly is the same as that for adults, and whether it works or not depends on factors such as whether it is symptomatic. Si Mo Tang is composed of ginseng, betel nut, sedum, and tian dai wu yao, and its effects are to move qi and lower rebelliousness (to promote the downward movement of upwardly rebellious qi), and to broaden the chest and disperse stagnation (to relieve stagnant qi in the chest and dissipate stasis or toxins that remain in the body). It can be used to treat middle-aged and old people with Qi stagnation and food stagnation (accumulation of food in the stomach due to indigestion), which is characterized by distension and fullness in the epigastrium (abdomen), abdominal pain, constipation, and so on. Adverse effects are not known. It should be noted that it should be used with caution in patients with chest and diaphragm distension and those with spleen deficiency and kidney deficiency. If the elderly suffer from abdominal pain and constipation caused by stagnation of Qi and accumulation of food, drinking Si Mu Tang is useful. But if the elderly is other diseases, it can not achieve the therapeutic effect. Therefore, whether or not it is effective for the elderly to drink Si Mu Tang needs to be decided according to the elderly’s condition and other factors. If you need to use drugs, it is recommended to go to the hospital, under the guidance of a professional physician, do not use your own medicine, so as not to delay the condition.