Hello dizzydad. Yes I am on 10mg nortriptyline because when I went up to 20mg I had the worst stomach cramps ever and became really unsteady so went back down to 10mg which is great at controlling the 24/7 nausea. So they added in topiramate which I take at 25mg split in two doses, 12.5mg am and 12.5mg pm. I was supposed to go up to 50mg but have had such a great result with 25mg I am staying on that. I get a bit more ear fullness, or pressure changes with the topiramate but I can live with that as I can now do most things without getting dizzy!!! It is truly amazing because before the meds I couldn't clean my flat, put my shopping away, chop vegetables, basically move unless it was in a straight line! I haven't tried dancing yet but I feel like it!
I hope the combination works as well for you too