What worked for me is Piracetam. I originally started taking it for it's alleged cognitive benefits. I did not experience stellar improvements in cognitive function but what I noticed after I had been taking it for about three months is tinnitus faded away and lost high frequency hearing (8...
I've gotten nearly complete relief from tinnitus using Piracetam. I used 4.8G/day divided into three doses. I did not get instant relief like some others here, it took about three months, but it both relieved tinnitus and greatly improved my hearing, particularly above 10 Khz.