anesthesia
"I am a 63 year-old male in pretty good health.  Propofol was great for my colonoscopy.  It was given to me at 9:30 am.  I was a bit dizzy and groggy when leaving the doctor's office at about 11 am.  I slept most of the afternoon.  My thinking remained fairly clouded all evening.  The next day, at 11:40 am, my thinking is still a bit clouded.  I had not expected to need to heed the warning not to drive or take on anything challenging for 24 hours, but, in my case, it is clear that it was an important warning; I am glad that I heeded it."