Later on, the Senior Anaesthetist (Anaestheologist in USA?) later told
me that, if people are in severe pain ,you can whack enormous doses of
morphine etc into them, and they don't get addicted at all - the brain
breaks it down as fast as you provide it whilst countering the pain
stimulus.

When I had a kidney stone about 14 years ago they had to use morphine to ease
my pain. It worked and I never felt...high or buzzed. Just happily NOT in
pain anymore.

Gerard