Taking laxatives accelerates the rate of emptying of the gastrointestinal tract. Taking laxatives empties the intestines, usually in preparation for a colonoscopy, but this does not conflict with a gastroscopy. Do gastroscopy requirements in the previous night after 8:00 pm do not eat, but also recommended that night to eat some easy to digest, low residue food, so that the stomach can be in the next day before the examination of the basic emptying, gastroscopy can be clearly see the situation in the stomach, taking laxatives can ensure that the gastrointestinal tract is as clean as possible. However, it should be noted that no matter whether it is laxative or other food and water, it is not allowed to take a large amount of them 4 hours before the gastroscopy, in order to avoid the gastroscopy process, such as accidental inhalation caused by choking, infections and other undesirable consequences. Gastroscopy is an important test to identify lesions in the stomach and should be performed by a medical professional.