How do non-stimulants differ from stimulants?

I take acetazolomide for IIH, which reduces pressure in my brain and around optic nerve, however I take methylphenidate; which is a stimulant which doctors say have been increasing pressure in brain and around optic nerve so, right now, im not taking any medication for adhd but Im being prescribed atomoxetine which is a non stimulant; ive been told it takes longer to kick in, but also that it has no effects on dopamine so I’m worried about that as well, so if anyone has first hand experience in taking non-stimulants or a similar situation to mine where they have had to switch, id love some advice !!