anesthesia
"I'm an anxious person that required an upper endoscopy, small bowel biopsy, and flexible sigmoidoscopy. My doc scheduled me to have all 3 procedures done simultaneously using straight propofol with a licensed anesthetist administering it. I experienced absolutely no burning sensation upon injection, even without lidocaine, which I initially requested (they didn't have any on-site). My IV placement (crook of the arm) and generous vein size apparently helped to avoid the burning sensation. The Doc asked me if I felt any burning, I said no, and the next thing I remember was waking up in recovery. I don't remember any sensation of going under. I woke up about 45 mins later, which is slower than average, but I'm 5'6 and 108lbs."