anesthesia
"I need frequent colonoscopies because I'm high-risk for colon cancer.  Colonoscopy drugs/anesthesia are the main risk factors in this exam and I have experienced terrible side-effects from sedation so I do my exams unsedated.  My new gastro talked me into Propofol and it was a disaster....low BP requiring pressors and the Certified Registered Nurse Anesthetists had to call the anesthesiologist  to basically keep me from dying.  Needless to say the colonoscopy was not even started due to the problems with Popofol.  Several friends have a colonoscopy with Propofol and have reported that the felt O.K. immediately afterwards but experienced long-term memory loss and depression for months after getting Propofol.  All the them would never consent to Propfol in the future."