I was recently diagnosed with Meniere's disease. I have had tinnitus with some hearing loss for about 2 years and wear a hearing aid for the tinnitus (caused from medication). However, I have had vertigo, nausea, etc. A surprise happened when I went to the ENT last week and did a hearing test. I had thought that my hearing had improved a bit, and had noticed less tinnitus, though still had vertigo and nausea. I was told that my hearing had actually improved! Yes, I had been decreasing the medication (steroid dependent asthma). The ENT told me that is was Meniere's, and not a neurological problem - if not my hearing would not have improved. Hearing can get better or worse with Meniere's. While there is little that can be done, I was told a low sodium diet (which I do anyway), drinking lots of fluids (which I do), and taking a diuretic (which I do), can all improve the Meniere's. He said I could take a medication for the vertigo - but it does not prevent it - just makes it go away quicker.
I hope this info is helpful. I will ask my chiropractor about Meniere's, as I have significant left neck pain - same side as the ear issue. Maybe they are related and he can help with that, not just the neck pain. Good luck and hope some of this information is helpful.