I've had dozens of patients and two personal dogs with vestibular disease. As Mark said, it's very common and distinguished by the eye movement (nystagmus). I find it interesting that these episodes happened after an allergy shot. Were these cortisone injections or true allergy hyposensitization?
I'm not sure of the association if they were cortisone shots, as Mark said we sometimes use cortisone to treat. Meclazine is sometimes used but I prefer cerenia as an anti-nausea because it's once a day.
We found with Megan and Charmin (both around 13-14 when they had episodes) that having something to press against (like a wall) when walking or laying tended to eliminate some of the spinning. They both recovered within a couple of weeks with minimal head tilt.
BTW, Sandy has pretty consistent vertigo. She also doesn't bend down head first, we sleep with lights on and she has a pretty constant slow routine rising in the morning or else the day can be spent spinning.
Doug, DVM
