Hi Tinner. I know what you mean about Propranolol. It was the first medication I was prescribed and there was a kind of slowness that came with it. Though like you, I found that it did help. Maybe you should just ask your neurologist (or GP) for Candesartan and give it a try.
I have never tried it but here is a link to a discussion on it. The comments are mixed but there is someone on here who says Candesartan gave them their life back.