Well it might be worth persevering. I wonder if you can take Ami or Nori on top?
The reason I say that is that Propranolol is a Beta blocker and there is evidence that it may block the effect of one neurotransmitter that increases pressure in the ear, as per @GetBetter :
"Systemic isoproterenol (b-adrenergic agonist) increased endolymph pressure and decreased the potential of the endolymphatic sac lumen, while not affecting CSF pressure. "
Did a wikipedia and came across the following
a)Guess what Beta-blockers can block activation of all types of β-adrenergic receptors. (propranolol)"
I wonder if this drug might represent one of the few cures?
There has to be a reason why it is usually so effective and is essentially the drug a lot of doctors try first.
I'm assuming of course MAV is a hydrops condition, but I'm fairly convinced now that it is.
How long did that take? Maybe I shouldn't have given up so easily!