a somewhat related question to the thread Title;

So many have been asking about WD.
I'm wondering what it takes to become dependent' in order to worry about suffering WD in the first place.

Everyone's chemistry is different, but is there a basic amount of opiates over time- schedule'
that one can be fairly certain they have reached that much in their system to warrant WD?
(kind of dufus' question, but I'm curious)