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Gradual haring loss needs detail examination. to start any medicine first thing to make out is the cause of deafness
. there are few types of this dz ie. conductive deafness, etc. others i dont remember but its not possible to help you here. please consult a ENT surgeon and investigate yourself. once the diagnosis is clear you can be greatly helped. now hearing aids
are latest and more efficient.
I hope I answered your query. Wish you good health.