Have a question to adhd experts here.to my knowledge medications used to treat it lead to ~30% improvement on adhd scales? can someone elaborate this?

I think you are : referring to psychological studies of what happens to children w' ADHD when they reach adulthood. About 1/3 outgrow it, 1/3 learn how to cope w' it and do not need medication anymore and 1/3 need to continue using medication.

?ADHD scales: Rating scales, if that's what you mean, to measure response to a medication are mostly used in research, eg, to measure the effectiveness of a medication in the testing phase to gain FDA approval. Most doctors judge clinical improvement in patients with ADHD by seeing that the benefits of medication outweigh any risks or side effects, that the person is doing better.