Hi Sequimite,
Welcome to the ANA forum - it's a very useful place for resources or to chat with people who suffer as you do, and truly understand. I was diagnosed with Meniere's disease in the early 90's. I had a couple of episodes of vertigo and ringing in the ear. In late 2010 an MRI revealed I had a AN. During that year I suffered from constant vertigo attacks, full spins lasting many minutes with a consistency of every few days. I chose surgery right away - I couldn't live like the way I was living. The vertigo is gone, the ringing is worse !
What I do to help the ringing from getting worse. Yes I am also on a diuretic, I also stay away from all processed meats that contain nitrates like cold cuts, bacon and hot dogs ( I'm dying for a hot dog !! ) etc. I stay away from sulphides as well. I miss my wine - they contain sulphides. I stay away from all caffeine, and I try to get quality sleep every night. If I'm going to be exposed to a loud environment - I wear ear plugs. I hope this helps, I would continue to look at everything possible in your lifestyle that might have an effect - good or bad on the ringing.