Hi danni. I can tell you my experience but please remember that it is only my experience. I would hate to put you off if this is going to help you. But at least you will have an idea what to look out for.
I started Topiramate at 25mg at night. I don't recall any hearing issues until I started 50mg a week later. At first my ears felt strange (not sure how else to describe it), then my hearing started zoning in and out (not completely), but it went quieter on and off. I especially noticed when I started taking my evening tablet a bit earlier. Sometimes my hearing would go quieter almost immediately after I had taken the tablet. I also had hyperacusis towards the end, a blocked ear feeling, ear pain/pressure and numbness, a bit of tinnitus and a burning sensation. It took approx three weeks I think after discontinuing to get back to (almost) normal after this. The ear fullness on the left side didn't completely return to normal but it was close.
I have had a hearing test and my hearing is ok, but it is only tested up to 8,000 hz and human hearing goes up to 20,000hz. I have asked for a higher frequency test but the ENT consultant said he doesn't know of anywhere in the UK that does this, so I can't categorically state that I haven't lost any hearing because I don't know for sure.
It was easier for me to recognise there was a problem because I didn't have any hearing issues or ear fullness/pressure at all before. Apart from dizziness my ears were fine.
Why does your neurologist want you to stop Propranolol and Pizotifen if you are happy and well on those?