No harm has been found after taking Allium cepa, but Allium cepa is pungent, and if taken for a long time, it may cause gastrointestinal discomfort, leading to fire, nausea, abdominal pain, etc. Therefore, it should be taken in accordance with the doctor’s advice, and should not be taken blindly by oneself. Allium sativum is the dried bulb of Allium sativum or Allium sativum, which is pungent, bitter and warm in nature, and belongs to the heart, lungs, stomach and large intestine meridians. It has the efficacy of promoting Yang and dispersing knots, moving Qi and directing stagnation. It can be used for chest paralysis (chest tightness and pain) heart pain, epigastric (abdominal) plumpness (stomach fullness and discomfort) distension, diarrhea and dysentery and other conditions. Allium cepa has the effect of promoting qi stagnation, therefore, it should be taken with caution for people with qi deficiency, and should not be taken by people without stagnation. In addition, Allium cepa has a pungent flavor, and should not be taken by people with weak stomachs (no appetite, reduced food intolerance) and those who do not tolerate acidic flavors, and its prolonged use will have irritating effects on the gastric mucosa, resulting in gastrointestinal discomforts, symptoms such as flames, abdominal pain, and nausea, which should be noted when it is used. For the taking of Allium sativum, there is no clear basis for the harm that will arise, but we must pay attention to the indications can follow the doctor’s instructions to identify the use of medication, not blindly use the drug, the specific should be under the guidance of a physician to identify the evidence to be taken.