Avoid eating and drinking for 6 to 8 hours before painless gastroscopy. Taking cold medicine requires drinking water, so it is best to avoid taking it, but if the patient’s condition is serious, a small amount of water can be used to deliver the cold medicine. Painless gastroscopy refers to gastroscopy performed under general anesthesia, which can relieve the pain of the examiner to a certain extent, but before the operation of painless gastroscopy needs to be prepared, which includes perfecting the electrocardiogram examination, etc. by the anesthesiologist to assess the patient’s condition. It is necessary to abstain from eating and drinking for 6 to 8 hours before the operation. During this period, it is best to avoid taking cold medicines because cold medicines need to be taken with water, and drinking a lot of water may lead to choking, coughing, vomiting and other discomforts, and may also affect the results of the examination. However, if the patient’s cold is more serious, a small amount of water can be used to deliver the cold medicine, in accordance with the doctor’s instructions. In addition, the gastroscopy operation process needs to be biopsied to meet the recent history of aspirin and other antiplatelet drugs, so as not to be difficult to stop bleeding in the process of taking the test. Specific medication should be carried out under the guidance of a specialist, not unauthorized use of drugs.