When I got mine done (in the US) they gave me an IV of something that took care of the pain but didn't make me unconscious, and afterwards it gave me amnesia, s

When I got mine done (in the US) they gave me an IV of something that took care of the pain but didn't make me unconscious, and afterwards it gave me amnesia, so I can remember the fact of being aware, but not the details. Kind of like when you wake up from an epic dream, then ten minutes later you can't remember anything but how epic it was.