The last time I had a flex sig, two weeks ago tomorrow, the doctor put me out. This is because I am in a pretty bad flare of UP. Take Doc A's advice and do not use the Fleets enema. I thought I burned my butt out.....think I did more harm than good and I am still suffering from it. Felt like a blow torch going up my rectum.
All my previous flex sigs were done without sedation. Only once did he have to abort the procedure because my blood pressure shot up to over 200/110.
I'll be honest, it is not pleasant, especially if you are flaring. If you have the option of being sedated...take it. The doctor gave me just enough to knock me out for the procedure. I did not feel woozy afterwards and he showed me the pics he took. No need for me to watch the screen while he is doing it.