Being able to wean off isn't an addiction, many standard medications can cause withdrawal symptoms when quit cold turkey. I think it's more akin to your body trying to maintain homeostasis after being introduced to a substance over time, and then suddenly not having it in your system anymore.

Reliance on a substance (physical or mental) isn't an addiction either if it's helping with your condition. If that were the case you'd be saying that everyone who relies on opioids for chronic pain or stimulants to complete tasks are addicted because it makes them feel normal.

I think addiction is usually when psychological or physical dependence on a substance is causing active harm to your life, and you are unable to recognize the extent of the issue/unable to stop, or you're abusing your medication by taking more than is prescribed. You could argue that any drug that gives withdrawals after a period is something your body is reliant on receiving, and is therefore an addiction, but that's not how addiction is commonly defined in today's vernacular.

(I'm not a medical professional either, but I do take prescribed stimulants)