There's a difference between "can't" and "don't like to", they aren't going to suffer from any severe withdrawal effects from not having it other than simply no

There's a difference between "can't" and "don't like to", they aren't going to suffer from any severe withdrawal effects from not having it other than simply not liking being sober. Caffeine withdrawal is far worse for example. Of course if they're using it for something like pain relief, or some other medical reason like you said, that doesn't really count as addiction.