I had oral morphine prescribed to the cat! I ransacked my wife’s drug cabinet and swallowed several cat sized doses which worked out to be about one human dose. Now I understand why people get addicted to opiates, I was sitting in a café and felt like I was flying on a cloud. What was the most brutal pain of my life (mouth, jaw, brain, all screaming in unified pain) turned into ecstasy and only for a few hours, as well.
I think at one point I was lying on the floor with a towel clench in mouth, to divert the pain. Writhing.