People who have not had a bowel movement after 6 hours of taking Bisacodyl can drink more warm water in moderation and exercise properly. If there is no improvement, it is recommended to go to the hospital and change the medication or take further treatment such as enema under the doctor’s guidance. People who do not feel like having a bowel movement after taking Bisacodyl may be less sensitive to this medication and it is recommended to change the medication or have an enema under the supervision of a doctor. A colonoscopy should only be performed when the bowel movements are watery, yellowish and scum-free. It is important to ensure that the bowel is clean before the colonoscopy, fasting and water fasting for 12 hours, and people with high blood pressure, heart attack and other diseases need to be evaluated to check if they can undergo colonoscopy.