Electrolyte Bulk, or Compound Polyethylene Glycol Electrolyte Bulk, is correctly consumed usually 8 to 12 hours before the first dose before the colonoscopy, and 2 to 3 hours before the second dose before the colonoscopy. Compound Polyethylene Glycol Electrolyte Bulk is a commonly used clinical laxative, mostly used for bowel cleansing preparation before colonoscopy. The first time before colonoscopy 8 to 12 hours before taking: take 1 box of compound polyethylene glycol electrolyte bulk (containing A, B two kinds), the box of A, B packets of powder and poured into a cup with a scale, add warm water to 750 ml, stirring until completely dissolved, half an hour can be divided into 2-3 times to drink, and so on, and then drink 3 boxes. Take it 2-3 hours before the second colonoscopy: drink 1 box in the same way as the first one, until the watery stool is discharged. Note: It is forbidden for patients with intestinal obstruction, intestinal perforation, gastric retention, gastrointestinal bleeding, toxic enteritis, toxic megacolon, and for those who are allergic to the components of this product. Adverse reactions after administration include abdominal distension and vomiting. If necessary, please go to a regular hospital and use the medicine under the guidance of a physician, avoiding patients taking it alone at home.