If the blood pressure is high and the patient is taking antihypertensive medication on a regular basis, it is necessary to take antihypertensive medication on the morning of the gastroscopy. Under normal circumstances before doing gastroscopy need to fast for 6 to 8 hours, but because gastroscopy is an invasive examination, such as the patient’s high blood pressure, when the gastroscope into the patient’s blood pressure may stimulate the patient to continue to rise, which may lead to cardiovascular and cerebral vascular accidents, so gastroscopy before the blood pressure should be controlled in the normal range. Because the gastroscopy process is more difficult, so the blood pressure, heart and so on need to have certain requirements, gastroscopy before the examination must measure blood pressure and improve the electrocardiogram and other tests, inform the examining physician has no other previous diseases and so on. Therefore, you should take your antihypertensive medication regularly on the morning of the gastroscopy, but try to take it with a relatively small amount of water. For more information about gastroscopy appointments, please consult your local hospital. If you feel unwell, it is recommended that you consult your doctor promptly.