One point: there is a major difference between addiction and dependence. Addiction is about chasing a high, raising the dose as one builds tolerance.

Dependence is about having problems when quitting after using for a bit. It is an issue with proper use of benzos, antidepressants, etc. A person who is dependent on, say, Xanax may be just taking it regularly in a low dose. But when they quit, unpleasant symptoms can arise - beyond just a return of whatever they were being treated for. So quitting these often requires a long tapering process - see my post on "hyperbolic taper" above.

That person is not addicted, is not an addict, but rather is the usual responsible user of the medication.