This disorder tends to arise in the middle or late years of life. Each attack begins suddenly, usually with a buzzing in the ears and then severe giddiness.
It may be so severe that the person feels he is being thrown to the ground.
Consciousness is rarely lost. Nausea and vomiting are common.
The giddiness, nausea and vomiting are the same symptoms which occur with motion sickness due to a temporary disorder of the balance due to external motion.
The attacks last from 15 to 60 minutes but it may take the sufferer hours to fully recover.
Most attacks come on without any precipitating factor or any prior warning. They may occur during sleep.
The disorder can affect both ears.
The diagnosis is usually made on the history which involves those three factors of periodic giddiness, deafness and tinnitus.
The initial treatment is by drugs. Sedatives may be useful also a variety of the anti-histamine or anti-allergy drugs.
If those measures fail surgery must be considered.
Modern surgical procedures which have been made possible by the operating microscope can overcome the giddiness without damaging the auditory nerve and therefore preserve the hearing.
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