meniere's disease
"My vertigo was so bad that I could not stand up much less work or drive a car. My ear doctor gave me valium to treat the ear instead of surgery he did not think surgery would help after a month of vertigo.  Afterwards I had a fear whether  it will come back. For years I would avoid heights because my first vertigo was on the upper deck of the freeway. I will say people do not understand some one that has vertigo for a long period of time. The valium helped but so did therapy"