Wow, I had to jump right in here when I saw you have Nystagnus....I have that, TOO! I'm 16 months post Cyberknife and all was well, when 3 weeks ago I started having Nystagnus (i found the term on the cyberknife forum after I explained it...I was saying tracking, when things go back and forth, or up and down). It's different than vertigo, I knew that. I had a couple of episodes in the fall that went away after 20 mintues or so, then I as on my way for months without any. This past May, they were coming really hard and once I couldn't get out of bed. I started taking steroids for 2 weeks and that stopped it. I really was a mess these last two weeks, felt like I had brain fatigue, also. I don't know how I was functioning.
Anyway, I finished my round of steroids a week ago, and the everyday dizziness was getting better. Had a few days of intense head pressure and not feeling well.
Then, this morning, the nystagnus hit.. I had read about Antivert, (the active ingredient is Mezclinine), and it's also in Draminine non-drowsy, regular dramamine, bonine, or generic tablets (25 mgs). I went ahead and bought some the other day. I took 25 mg when it started and within the hour the nystagus is gone, and so is much of the dizziness. Whew. I really don't want to do steroids again...I was getting 3 hrs/sleep a night for 10 days. I'm just now starting to get 5-6 hours, and feeling much better.
I'm going for my 18 month MRI within a couple of weeks, a bit early, but Dr. Chang wants one which I'm happy to get.
Anyway...I guess my rambling post is a recommendation for you to try the Bonine, or dramamine non-drowsy to see how that works (along with seeing your doc). It may give you some immediate relief like it is me.
Good luck. I know my tumor is plumped up from my 1 year MRI, and it still must be. I'm just really wishing this thing would shrink, die and leave me alone. Tisha