Many years ago, as I was trying to solve the mystery of the horrendous headaches I would get on a regular basis (couple of times a week, for years), I went into the local hospital, as usual, for a shot of dilaudid. The doctor informed me that I was getting just a little too regular with my coming in for the pain, and told me that I would not get any more demerol until I went to see a neurologist.
The neurologist recommended that I have a CAT scan, because I might have a brain tumour. I went in and got prepped for the scan, which included being given an injection of iodine. The nurse belatedly asked me if I was allergic to anything. I'd never mentioned before that I am allergic to shellfish when answering the 'are you allergic to any medication', because I never thought about shellfish being 'medication'. But that day I told her that I was not allergic to any medication, but I was allergic to shellfish. She blanched, and immediately went to get me a shot of, yes, you guessed correctly, demerol.
When being given a shot of demerol for the migraines (since that's what the horrendous headaches were), I never experienced anything except for an urgent need to just go to sleep.
Let me tell you, getting demerol when not having a migraine was AWESOME. I felt GREAT. I could understand how people could get addicted to the stuff. But that wasn't why I needed demerol.
At any rate, I am not an addictive personality except for when it comes to horses. Also, I don't handle opiods very well, as I get rebound migraines from taking them. A prescription for 20 tablets of oxycodone, prescribed for me when I had my appendix out almost a year ago, still has 10 tablets left.