I felt like the euphoria was from being able to focus and retain details about uninterrsting things for more tha a few minutes, and after a few weeks the novelty wore off.
That's why it's not prescribed willy nilly. If you can improve sustainably with coping mechanism, that's always healthier in the long term. It's always preferable to depend as least as possible on the meds.
There's also usually a ramp up period with a lot of medication. It takes time before it really starts working so there's a very real chance this is more of a placebo effect
I think it depends on the meds there to some extent. Anecdotal, and certainly not immune to my own placebo effects, but Adderall always feels pretty good at giving me laser eyes -- even when being a bit on/off with it.