well i am convinced my exboyfriend has ADHD but he was never diagnosed(but that's another story).
My dad's best friend adopted her foster kids all with adhd, which can be interesting at times lol the kids are great but they can get into quite a bit of trouble esp if they aren't taking their meds.Which can sometimes be a fight to get them to take their meds. But i did learn that with ADHD kids if they haven't taken their meds or meds have worn off caffeine works differently on them instead of making them more hyper it kinda calms them down.
If their meds have worn off or they haven't taken them she might tell them to drink a Mountain Dew. I was shocked when i found this out, but i have to say it does work.