Gentamicin has come up before on the forum, so I was puzzled why search didn't find it. The first time I searched, I didn't get anything either. Then I searched for injection, and that brought up some Gentamicin topics. Then I searched for Gentamicin again, and it came up. My only hint: make sure you go to the main page before you search, so the search covers the entire forum, not just one section.
So anyway, it has come up. One woman in Sweden (catlover) had three injections prior to surgery, but they didn't seem to do anything, and the doctors decided to go ahead with surgery, not keep trying. Many are wary of it, because Gentamicin can cause
hearing and balance problems. If you are having surgery anyway, it is not likely to cause additional problems. The idea is to make sure that any residual balance function is wiped out, so it doesn't cause you problems later.
Here is a later post by catlover: http://anausa.org/forum/index.php?topic=8865.0
. There are some others by people who considered it, and probably a few others who did it. My impression is that it is not much help, and probably not relevant if you are having a translab that will remove the balance nerve entirely anyway.