Not wanting to have a bowel movement after drinking laxatives before having a colonoscopy can be promoted by adjusting the laxative dose, type of laxative or enema. 1. Adjust the laxative dose: patients need to do bowel preparation before doing colonoscopy, usually by taking laxatives to clean the intestine to ensure that there is no residue in the intestine, which is conducive to the examination. When the stool becomes watery, it means that the intestinal tract is better prepared. If the patient does not want to have a bowel movement after taking the medicine, it may be due to insufficient dosage of the medicine, and under the guidance of the doctor, the dosage of the laxative can be increased to promote bowel movement. 2. Change the type of laxative: usually, before the colonoscopy is to take polyethylene glycol 4000 bulk to carry out intestinal cleansing, but if the patient is not sensitive to it, it may also lead to the drug does not want to bowel movement. At this time, patients can change the type of laxative, take mannitol, senna, magnesium sulfate and other laxatives to help defecation. 3. Enema: If you can’t have a bowel movement after taking the medication, you can also take an enema with warm salt water to remove the debris in the intestines. If the patient does not want to have a bowel movement after drinking the laxative before the colonoscopy, it is recommended to consult a doctor in a timely manner and take reasonable measures under the guidance of the doctor to ensure compliance with the requirements of the colonoscopy.