I have read your post several times gumboat and given it a lot of thought but have unfortunately come up with the conclusion that AB will have little to offer. At the outset, I would like to make a point and that is that we often see with AB posts in Body and Soul a link produced that will show that a symptom may be a side effect of a drug and ipso facto the drug has caused the symptom......that is not necessarily the case.
What am I trying to say? I am suggesting, very strongly, that your tinnitus may have nothing whatsoever to do with your diuretic therapy.
Yes, Bumetanide is a loop diuretic, but I disagree with the source that has incriminated it to your problem of tinnitus. In my opinion your tinnitus has little to do with your diuretic therapy of which you need to "keep you going."In my opinion, 5mgms of Bumetanide is insufficient to control your fluid retention and could be doubled, the second 5mgm dose given at night.
I cannot convince myself that it would make your tinnitus worse. You could even take the Bumetanide from Monday to Friday and then discontinue for the weekend and then start again on Monday.
This is just my opinion.....get the agreement of your Dr first.
Although you feel that Metolozone and Spironolactone are, in your words, useless, do not discontinue them as those two drugs and Bumetamide, for you, are "the only show in town".....if you get my point.
No...I don't think that resorting to thiazides are the answer and no thiazides are not known to cause tinnitus.
What to do with the tinnitus? If it as debilitating as you have posted, then perhaps a referral to an ENT surgeon or Audiology Clinic might be advisable as a masking device may well be suggested.
If i have missed the point of your post.....forgive me.