Do check! You cannot have a General Anaesthetic because you have to actively swallow. You have only a vague idea of what is going on if you are sedated, but I have also had the procedure with only a throat spray - no sedation at all. It was one of the worst experiences I have ever had, medically speaking, and I will never undergo it again.

Do remember that this is an important diagnostic tool that your Dr would not be asking for without reason. Apart from the Anxiety, it really only causes a bit of a sore throat for a couple of days, your stomach will not be affected at all.

Dave.