I have had three endoscopies done, two with conscious sedation and once totally out. i will do it totally out next time, which I 'm sure there will be. But the versed was actually fine; I won't do it again like that as my doc ONLY gave me versed, with no relaxant/pain killer. I guess I gave him a rodeo and yanked the scope out myself. THEY would prefer I am totally sedated!! I have had versed for several colonoscopies and prior to several surgeries with no problems. As for nausea, I have thrown up (once) after fentanyl (which they give a lot with versed) but now use phenergan suppositories which are, I have found, great for nausea! Used them after surgery too and they were a Godsend.
If you look up versed, and the "michael jackson drug",you will find things mentioning long term memory problems for some people though. As everyone has said, I'd sure talk about it with your doctor. My stepmother died of colon cancer, so obviously I would consider the risks of NOT doing anything to be a lot higher!!