Generally do gastroscopy before, it is recommended that patients need to stop taking aspirin-based anti-inflammatory drugs for 1 week, general antibiotics do not need to stop in advance. Due to anti-inflammatory drugs such as aspirin enteric-coated tablets, has an anticoagulant effect, change the body’s coagulation mechanism, if the invasive gastroscopy, is likely to cause gastric mucosal bleeding, thus affecting the effect of the examination. If the patient can not stop using anti-inflammatory drugs due to the disease, you can switch to anti-inflammatory drugs with small anticoagulant effect. If the patient is not necessary to do gastroscopy can also take other methods of examination such as digestive barium meal examination, capsule endoscopy, etc. to replace gastroscopy. It is recommended that patients need to strictly comply with the doctor’s instructions for the preparation of gastroscopy, so as not to affect the results of the examination.