Hi, my friend.
I've written about this in different threads, though I've probably forgotten where by now. But here are the key points:
For me, anything with GABAergic properties has a profound short-term positive effect on both my tinnitus and noxacusis. Benzos, Baclofen (GABA B), and Carbamazepine all seem to have a similar effect. You have to dig a little to find that Carbamazepine is a GABAergic drug since it is primarily known for its sodium channel modulating properties. But I can tell you from experience that Carbamazepine's "brother" from a non GABAergic "mother," Oxcarbazepine, did absolutely nothing!
Even though Carbamazepine might not be as addictive as benzos or possibly Baclofen, it is a unique medication in that it strongly induces our most common liver enzyme CYP3A4. This means other medications you are taking may stop working, which was bad news for me since I take multiple drugs. Be sure to check for interactions before using it. Out of all the drugs I have tried, this one had the strongest impact not just on my tinnitus but even more so on my noxacusis.
Love,
grate_biff