Many of our members have reported some benefit from Mirtazapine (Remeron). I don't think it has directly alleviated tinnitus in most cases, but can be a wonderful sleep aid, for example. And we all know how important that is...Perhaps I should ask for Remeron, or Mirtazapine as it's known here in the UK. I don't want to piss my doctor off though, might not take too well to me asking for specific medicines....
You could approach your doctor in a roundabout way, saying for example that you were in a tinnitus support group where people had experienced positive benefits from taking mirtazapine, and that it had improved sleep (length, quality) in several people.
Like said, it's not addictive, and doctors generally prescribe it without much hesitation...