Polyethylene Glycol, or Compound Polyethylene Glycol Electrolyte Dispersant, is taken orally and begins to produce a bowel movement in approximately 1 to 2 hours. Polyethylene Glycol Electrolyte Complex is usually used for bowel cleansing preparation before colonoscopy. The drug reaches the intestines and takes about 1~2 hours to work, so bowel movements usually start within 1~2 hours after oral intake. However, there are some people who are not sensitive to the drug ingredients and the onset of action will be prolonged appropriately. Adverse reactions to Compound Polyethylene Glycol Electrolyte Dispersant include nausea and vomiting, diarrhea, and anal discomfort. It is prohibited for patients with gastrointestinal obstruction, intestinal perforation, gastric retention, gastrointestinal bleeding, toxic enteritis, toxic megacolon, etc.; it is also prohibited for patients who are allergic to the components of polyethylene glycol. Compound polyethylene glycol electrolyte bulk of specific medication need to follow the doctor’s instructions, not blindly used on their own.