the opposite for me, makes it easier for me to solve problem because i can cohesively hold multiple thoughts in my head for long enough for me to see the patterns to be able to understand them, along with the emotional regulation an increase in executive functioning ability that meds help with (which is what adhd really is, not just problems with motivation or bad at concentrating)

but i also work out 5-6 days a week and that + meds have been a huge boon than just meds because it keeps the depression down too, which is what you might be afflicted with because on my rare off days i still can do some work & be motivated