Most ADHD meds either have conflicting side effects with propranolol or affect how propranolol is metabolized in the liver. I take Wellbutrin and Propranolol carefully as Wellbutrin is a strong inhibitor of CY2D6 (major pathway for propranolol) and slows down metabolism, resulting in more propranolol in the blood. I take a low dose of propranolol.

I take Concerta for my ADHD and propranolol. I don't notice the Concerta increasing my heart rate. I take 36mg of Concerta and 40mg of propranolol. No problems so far been years in Concerta about 4 or 5 months on propranolol now. I don't think my propranolol dose would be enough if I was more mobile though. I am mostly bedbound due to my other chronic illnesses.

It sounds like a lot of your issues, at least when it comes to the ADHD, or with executive function. I found that a combination of a medication that works for me and sort of unofficial occupational therapy (I haven't spoken with an occupational therapist, but I have a friend who has been dealing with her ADHD her entire life, and she is able to make a lot of suggestions to help me with my executive function.) I found that making lists helps me focus a lot. It also really helps when I'm feeling overwhelmed by a task if I can break it up into small steps on a list. Then instead of having to look at the whole task, I just look at the first step, and I tell myself over and over again that I don't have to do everything, I just have to do that first step. And then I reevaluate once that step is done, and decide if I'm up to doing a second step right then, or if I need a bit of a break. Fidgeting and hyperactivity, I'm a huge supporter of fidget toys. Whatever feels right to you. I have a little squishy memory foam cat that my niece gave me for Christmas last year, and I am not above sitting there and squishing it the entire time I'm making phone calls. Same thing with fidget spinners or fidget cubes, or anything like that. I was known to carry one around in my pocket at work, and sit there and meetings taking notes with one hand and fidgeting with my toy in my pocket and the other. As far as the sensory overload, the best thing I have found is some noise canceling earbuds. I have a pair that lets you decide if you want all noise blocked, or if you want to still be able to hear background noise, and when I'm feeling over stimulated by all of the sounds and sensations around me, I pop those in and either put them on a full noise block and close my eyes until I feel a little less shaky, or I turn on some soft music or some kind of soundscape, or something like that. Being able to control the amount of noise that is coming in really helps me a lot. Believe me, I understand real life getting in the way of trying to take care of your mental health. Have you tried a self-care app? I'm on Finch, and it's really helped me to set goals on there, and there's enough different things that I can do with my little finch before it to actually hold my interest longer than most other things. I haven't found anything that really helps with the hyper focusing, except for perhaps learning when you're doing it and making the conscious effort to take a step back. Mostly, I'm just glad that I have friends who are willing to listen to me ramble on endlessly about this band this week, and that video game next week, and so on. I hope at least some of this is able to help, and I'm sorry I couldn't help more with the POTS portion of your question.

I can't give much advice myself because I don't even have an official diagnosis yet, but as far as any new medications you might try, avoid SNRI's!!! Stuff like wellbutrin, cymbalta, effexor, etc. SNRI's are known to make POTS symptoms significantly worse, and i've experienced it first hand. ive only gotten close to fainting once or twice over 5 years ago, but since starting an SNRI (cymbalta) ive fainted/gotten close to fainting at least 3 times within the past few months- one of the most terrifying things that's happened to me holy shit i hate fainting. ive also been very easily dizzy, just moving my head can make it feel like the room is spinning. Whenever you and your Dr(s) are talking about starting a new med always look it up in relation to any medical issues you have, I definitely should have!