One of the many reasons so many deny ADHD as a biologically valid medical entity is the simple observation that too often the ADHD stimulant meds simply don't work predictably.
Every ADHD medication and supplement should have a Sweet Spot wherein on the one hand it works well, and on the other there are no side effects. Review these tips for more successful ADHD target recognition.
If you don't inject time *and thus context* into your ADHD assessments, you will miss the boat more often than not. No this isn't particle physics, but Heisenberg did get it right in 1927: Time matters