I was given percocets after surgery. They made me feel extremely well, and when I realized that I wasn't in pain but still taking them, it scared the crap out of me. Flushed them all down the toilet. I am one of the lucky ones. Chemical dependency removes your ability to think straight and rationally. Removes your will power, and self control.
You really need to nip it in the bud before it becomes a problem. The only addictive problem I suffer from that challenges my self control is a Chinese buffet or all you can eat sushi deal. I'm lucky if I can walk out of the restaurant.