I did eat. I still puked. I took less than the recommended dosage.
I've never once felt high or remotely pleasant on pain meds, so I assure you that was never an aim. The first two times were when I had my wisdom teeth removed, and got dry sockets with both operations. The second two involved severe ligament damage.
All four instances I was in significant pain and chose to deal with the pain rather than continue medication. That stuff doesn't affect everyone the same way. I can't even imagine how people get addicted, that's how horrible it makes me feel.