During an upper endoscopy, a thin, flexible tube with a camera and light on the end will be inserted through your mouth and into your esophagus. The camera can then transmit an image onto a monitor in the testing room. This allows the physician to see the lining of the inside of the esophagus. An upper endoscopy usually takes just 15 to 30 minutes, but you may be in the exam room for a couple of hours in order to prepare and recover from the procedure.
A pain reliever will be administered to ease any discomfort in your throat. A mild sedative may also be given before an upper endoscopy. Because of this, you should arrange for someone to drive you home after the test. You will be allowed to go home within an hour or so of your exam.
Your doctor will likely advise that you do not eat or drink for several hours before you have an upper endoscopy. Be sure to follow any specific instructions you are given and tell your doctor about any medications you are on.