anesthesia
"I was given Propafol today for my first colonoscopy ever (I am 65). I experienced tingling that rose up my arm and a distinct metallic taste in the mouth immediately after injection. I had just enough time to comment verbally on the sensation, then the next thing I knew I was waking up. I do not remember anything about the procedure and experienced no pain afterwards. The medical staff did comment that I coughed during my procedure. I felt a little groggy for 5-10 minutes after awaking, but was steady on my feet shortly after. The only side effects I've experienced are transient coughing and a headache a couple of hours after the procedure. The latter may have been due to low blood sugar from the colonoscopy prep."