A laxative is usually required four hours in advance for a colonoscopy.
Bowel cleansing is required before colonoscopy to facilitate clear observation of the intestinal tract. Hospitals commonly used intestinal cleansing drugs for compound polyethylene glycol electrolyte bulk, for osmotic laxatives, clean the intestinal tract at the same time to replenish electrolytes, will not cause dehydration and other symptoms, generally in the four hours before the examination, 250 ml each time, every 10-15 minutes to take until the discharge of watery clear stools, a maximum of 3,000 ml of oral intake.
You should not eat solid food 3-4 hours before taking the medicine for colonoscopy, and it is forbidden for patients with gastrointestinal obstruction, intestinal perforation, gastric retention, gastrointestinal hemorrhage, toxic enteritis, toxic megacolon, Crohn’s disease, and for those who are allergic to the product. Stop the medication immediately when any abnormal situation occurs, and wait for the symptoms to disappear before taking the medication again.
Follow the doctor’s instructions, do not self-medication, any abnormalities occur in a timely manner to consult a doctor.