The main side effects of painless gastroscopy are due to anesthesia, such as possible memory loss and slow reaction time, but they are less likely to occur. Painless gastroscopy is an examination performed by an anesthesiologist who injects an anesthetic intravenously into the patient before the gastroscopy so that the patient is asleep during the gastroscopy. Anesthetics have certain side effects that are less likely to occur and are generally within manageable limits. Because anesthetics have a depressant effect on the central nervous system, sequelae such as memory loss and slow response may occur after heavy use. After the drug has worn off, the symptoms will mostly resolve on their own. Before doing painless gastroscopy, you need to consult a professional doctor, who will decide whether or not to perform the test according to the situation. It is recommended that the test be performed by a professional doctor in a regular hospital, and the possibility of side effects and harm is small, so don’t worry too much.