That is a good site. Vertigo in its least severe form is dizziness and can be confused with motion sickness. I guess the important thing is how he diagnosed her. Did he simply look at her symptoms and make a diagnosis? Or did he perform specific tests? Vertigo can be a diagnosis, but it can also be a symptom of another disease or disorder. The key is to determine if what she's experiening is self-limiting or a symptom of an underlying disorder. Meclizine (Antivert) is used to treat vertigo and is contained in the OTC drug Bonine (which is used for motion sickness). If the symptoms don't improve or get worse, then I would definitely recommend a second opinion from a neurologist. A neurologist can take scans of the brain and perform specific tests to rule out any other possibilities and confirm the diagnosis. It's definitely better to be safe than sorry. Let me know if you have any other questions.