Electrolyte bulk generally refers to polyethylene glycol electrolyte bulk, vomiting after taking electrolyte bulk is not a normal situation, may be an adverse drug reaction. Polyethylene glycol electrolyte powder has the effect of cleansing the intestinal tract, diarrhea, empty intestinal contents, etc., clinically used for enteroscopy, intestinal surgery, etc., preoperative preparation, generally does not cause vomiting, some patients in the phenomenon of vomiting after taking electrolyte powder is generally due to an adverse drug reaction. Polyethylene glycol electrolyte powder in the use of the period may appear nausea, fullness, abdominal pain, vomiting, anal discomfort and other adverse reactions, need to pay attention to this drug allergy and pregnant women generally can not use polyethylene glycol electrolyte powder. Polyethylene glycol electrolyte bulk should be used under the guidance of a physician, not blindly self-medication.