Have you found that migraine prevention treatments help non-specific vestibular symptoms in migraine patients?

Yes, vestibular symptoms can respond to migraine treatments in patients with a history of migraine. SNRIs may help more with vestibular symptoms, or adding an SSRI to migraine prophylactic treatment can help.

Yes, they can.

I would say no to this question, so I would encourage further workup to identify the source of the vestibular symptoms.

Yes, many of the treatments can also help with vestibular symptoms. In my own practice, I've seen the most response with Botox. Beta blockers and SNRIs have also been helpful.