That is not true. Vyvanse, caffeine, etc., helps my brain calm down and focus. I don’t get hyper. In fact, if I have too much caffeine, I start yawning.
My wife, who does not have ADHD (at all), gets hyper from stimulants.
I am not suggesting anyone use their response to stimulants as a diagnosis of ADHD. However, speak to anyone who has it and they will relay that stimulants make them calm, not hyper.
People without ADHD get hyper, not calm. Some others also get calm.
But people with ADHD who take stimulants do not get hyper.
My wife, who does not have ADHD (at all), gets hyper from stimulants.
That’s the difference.