Propofol
"This was my second Colonoscopy in 5 weeks, as the Doctor was unable to access my cecum. So I had my second one September 5, 14. I was given Propofol again, only this time I was also given Lidocaine with it. The Dr. started with propofol then added the lidocaine in my iv. Was out shortly after.
I woke up feeling okay but my insides hurt and had extensive bruising on my left side, it looked like I had a bad reaction to lidocaine. It turns out it was 
really bad bruising from all the pushing down they did to complete the procedure...all benign polyps. Next test is in 3 years."