Meclazine helps me deal with the dizziness, but it only works for a few months. You need to get to the root cause. If she wakes with vertigo then perhaps part of the problem is positional vertigo. Recommend you see an ENT who knows how to do the Epley Maneuver. Don't try this without an MD present the first time. Here's an example of one method.. YouTube - ‪Epley's maneuver‬‏