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is commonly due to ear pathology which usually is a temporary problem. However in people above 40 years with previous medical disease such as hypertension
, sudden onset vertigo needs to be evaluated. Other causes such as electrolyte disturbances, transient blood circulation disturbances in the brain need to be ruled out.
So, she needs a careful examination by your doctor.
In the meantime, you can give her vestibular sedatives like cinnarizine
- antihistamines and benzodiazepine
group of medications can help her. You can check with your pharmacist about over the counter availability of these medications.
Hope this helps.