When to cut back on antivirals?

I'm one of the newbies who couldn't figure out how to send messages. Thanks to everyone for contributing to this forum. I have absorbed your messages and successfully used John of Ohio's methodology for getting a local ENT to prescribe antivirals for me. I have stopped having the total knock-down drag-out vertigo/vomiting sprees with the antivirals, but I seldom go a whole day without starting to get vertigo once or twice. I can somewhat head off disaster by quick chewing some meclizine, but I still stagger around in a dysfunctional fog sometimes. And I spend too much time on the couch trying not to move my head.

Had an audiology test on Nov 18 and the hearing in my affected ear is worse than last March. I'm scheduled for another test on December 9 and the ENT plans to follow the protocol and start cutting back on the antiviral. I know from reading here that some people have not cut back at all for many months. How do you really determine when it's safe to cut back? I'm guessing that if you cut back too soon, there's a good chance that you go right back to the vertigo/vomiting routine.

Should add that my first major attack was on July 31, after which I had quite a few attacks before I found this site and got onto the antivirals. Lost a lot of hearing in my right ear in 2010, but no diagnosis was made other than ideopathic until March 2015 when Meniere's was diagnosed, so it is probably too late to regain the hearing I have lost.