Quoting EasyComeEasyGo:" Do you think you're automatically subject to be an addict, or have addictive behaviors, because you come from a line of addicts? Why or why not?"
Genes load the proverbial gun. It's the choices the person makes that will decide if the trigger is ever pulled.
I have addicts in my family. My mother, most likely my father if he's even still alive, my half-brother for sure. I'm not an addict and never have been. But I've come close. I've chosen not to be and not to risk any of the behaviors that could lead me there, but if I did start doing those things, addiction would never be far behind me.
I was in a car accident 3 years ago, t-boned by some jerk in a jacked-up truck running through an intersection. My now-husband and I both had pretty nasty breaks. We got the same prescription for pain killers, similar layup times, similar pain prospects from what the physician said. And I'm usually much more pain-tolerant than he is, occupational hazard and all.
He had no problem at all ditching them after using them to get through the throbbing pain the first couple nights. He just shrugged and said, "eh, I'm fine now." I was dealing with the actual physical pain better than I dealt with kicking off the pain killers.