They don't know, sadly. I take Gabapentin which helps with neuropathy. Also it is a mood stabilizer. You might inquire about it but know that it is a medication that you have to ween off of. It isn't like a benzo, but it can't just be stopped or it can cause anxiety and agitation. I do not know what helps with tinnitus. That is also nerve damage that has happened since I started this sh&tty LONG COVID journey two years ago. Hang in there.