
I have autism and pots but not adhd. I take corlanor/ivabradine for the POTS. The most beneficial thing for me is just to lie down at least every 3 hours or else I get super dizzy. If I’m gonna be walking more than 10-15 minutes I use a wheeled walker that helps with balance and fatigue. I also have flexible attendance and deadline accommodations at school for the days I’m too sick to get out of bed or do any work.
You would probably have better luck with exercises that aren’t standing. You could try lifting weights sitting down. I personally like swimming because it’s easier on the joints if you also have hEDS, and I used to ride exercise bikes before my knee got worse. When I was first diagnosed I was given salt pills but I didn’t find them helpful. Some people find salt super helpful though so I think it’s worth a try. Not being dehydrated is important too but is something I struggle with