Don't they call that a disassociative something or other?
Paramedics give it to people on grim traumatic scenes.
(bogus official shove it up your cunt, Mon 13 Jun 2011, 0:13, archived)

It's a veterinary tranquiliser
The hit's a bit like coke but more spacey.
( Lord Gnome, Mon 13 Jun 2011, 0:25, archived)