I thought an endoscopy was the same thing as a gastroscopy. Maybe where you live the term endoscopy refers to a colonoscopy which looks at your colon and the gastroscopy looks at your upper GI tract=stomach.Myabe give the Dr/facility a call to verify.Do you have to do any type of prep before the test? I believe there is no prep other than nothing to eat or drink after midnite the nite before for the upper endo/gastroscopy. A colonoscopy would require bowel prep the day before.I have had both, one right after the other and for me it was no big deal, the bowel prep was the worst part. Also I was given a light general, but usually the sedation given works fine for most people (I had adverse reactions to the sedation at another time, which by the way is extrmely rare)