It doesn't matter how strong you are In some cases. If you are perscribe oxycotin for a bad injury and you are on It for a couple months.
I do not believe there is any drug out there that you can be hooked on after just a single use. Snort one line, and you're "forever hooked." No, not buying it.
If you were to tell me that you know someone, or that you are that person, that has become addicted after one line, injection or whatever I would call bullshit instantly.
I've known people who have injected smack over a period of two years, sometimes going months between use and weren't addicted whatsoever. Only when the trials and tribulations of life got them down, and they were looking for something to fall back on did they start using more frequently and thus started shooting every day and that's when they became addicted.
If you are strong, one use will not make you addicted. But if you are not strong, then you will find a reason to use another time, and another etc...and thus after repeated uses you are now addicted.