I think medicine should be used as a last resort and it is not a "fix" or "solution". Dealing with my ADHD is still a daily struggle and I didn't transform into a better person by taking the medicine
What it did was to turn my experience of my life from a large overwhelming interconnected problem into small doable issues. It made me able to pick up each of the many broken aspects of my life, fix it, and move on to the next
I'm afraid of the notion, I often hear, where medicine "fixes" something. My ADHD didn't go away with the medicine, but it did make me able to take responsibility for my own life and feel confident enough in myself, that I don't want to apologize for needing a different environment to be productive
The good thing about methylphenidate is that it works quickly (20 minutes or so after taking it), so you know pretty quickly if it's a good fit. It wears off after 4-8 hours depending on the formulation, so if you feel worse it'll only be for a short period
Normally I feel like I see the world through the narrow end of a funnel. When I get done with a big workout, somehow for the next day or so my brain is chilled out and I can concentrate again. After two days or so I start to regress a bit but another bout of lifting resets me.
I only really need medicine during periods of bad health or incredible personal stress now.
I've also picked up meditating 10 minutes a day and that's been helping as well, but I don't think as much.
I bet that HIIT could be as effective as weights for me because the curative part seems to come from exhaustion and exercise of will.
Meditation may or may not be as mentally strenuous, I am not really familiar with it.